diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 16d875f..0000000
Binary files a/.DS_Store and /dev/null differ
diff --git a/.gitignore b/.gitignore
index 3f21372..83fedc9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
 *.iws
 out/*
-build/*
\ No newline at end of file
+build/*
+.DS_Store
+*.ipr
+.idea
+*.iml
diff --git a/META-INF/plugin.xml b/META-INF/plugin.xml
index 7b1f516..3eaf06c 100644
--- a/META-INF/plugin.xml
+++ b/META-INF/plugin.xml
@@ -2,8 +2,8 @@
 
 <idea-plugin url="https://github.com/mustah/TabSwitch">
   <name>TabSwitch</name>
-  <version>3.0.9</version>
-  <idea-version since-build="141.1532"/>
+  <version>3.1.0</version>
+  <idea-version since-build="141.178.9"/>
 
   <description><![CDATA[
     Open files/tabs switcher to quickly switch between tabs with less keystrokes than
@@ -18,6 +18,7 @@
     ]]>
   </description>
   <change-notes><![CDATA[
+    3.1.0: Ignore class file in Open Files list. Cleaning up some project cache files.<br/>
     3.0.7: Bug-fix: reverse recent files array _before_ checking their validity do be added to list.<br/>
     3.0.6: Remove TabSwitch settings. Is not used anymore.<br/>
     3.0.5: Project is upgraded to use java 7.<br/>
diff --git a/TabSwitch.iml b/TabSwitch.iml
deleted file mode 100644
index 1c9ba9e..0000000
--- a/TabSwitch.iml
+++ /dev/null
@@ -1,208 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="PLUGIN_MODULE" version="4">
-  <component name="DevKit.ModuleBuildProperties" url="file://$MODULE_DIR$/META-INF/plugin.xml" />
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-      <excludeFolder url="file://$MODULE_DIR$/build" />
-      <excludeFolder url="file://$MODULE_DIR$/lib" />
-    </content>
-    <orderEntry type="inheritedJdk" />
-    <orderEntry type="sourceFolder" forTests="false" />
-  </component>
-  <component name="org.twodividedbyzero.idea.findbugs">
-    <option name="_basePreferences">
-      <map>
-        <entry key="property.analysisEffortLevel" value="default" />
-        <entry key="property.analyzeAfterCompile" value="false" />
-        <entry key="property.annotationGutterIconEnabled" value="true" />
-        <entry key="property.annotationSuppressWarningsClass" value="edu.umd.cs.findbugs.annotations.SuppressWarnings" />
-        <entry key="property.annotationTextRangeMarkupEnabled" value="true" />
-        <entry key="property.exportAsHtml" value="true" />
-        <entry key="property.exportAsXml" value="true" />
-        <entry key="property.exportBaseDir" value="" />
-        <entry key="property.exportCreateArchiveDir" value="false" />
-        <entry key="property.exportOpenBrowser" value="true" />
-        <entry key="property.minPriorityToReport" value="Medium" />
-        <entry key="property.runAnalysisInBackground" value="false" />
-        <entry key="property.showHiddenDetectors" value="false" />
-        <entry key="property.toolWindowToFront" value="true" />
-      </map>
-    </option>
-    <option name="_detectors">
-      <map>
-        <entry key="AppendingToAnObjectOutputStream" value="true" />
-        <entry key="AtomicityProblem" value="true" />
-        <entry key="BadAppletConstructor" value="false" />
-        <entry key="BadResultSetAccess" value="true" />
-        <entry key="BadSyntaxForRegularExpression" value="true" />
-        <entry key="BadUseOfReturnValue" value="true" />
-        <entry key="BadlyOverriddenAdapter" value="true" />
-        <entry key="BooleanReturnNull" value="true" />
-        <entry key="BuildInterproceduralCallGraph" value="false" />
-        <entry key="BuildObligationPolicyDatabase" value="true" />
-        <entry key="CallToUnsupportedMethod" value="false" />
-        <entry key="CalledMethods" value="true" />
-        <entry key="CheckCalls" value="false" />
-        <entry key="CheckExpectedWarnings" value="false" />
-        <entry key="CheckImmutableAnnotation" value="true" />
-        <entry key="CheckRelaxingNullnessAnnotation" value="true" />
-        <entry key="CheckTypeQualifiers" value="true" />
-        <entry key="CloneIdiom" value="true" />
-        <entry key="ComparatorIdiom" value="true" />
-        <entry key="ConfusedInheritance" value="true" />
-        <entry key="ConfusionBetweenInheritedAndOuterMethod" value="true" />
-        <entry key="CrossSiteScripting" value="true" />
-        <entry key="DefaultEncodingDetector" value="true" />
-        <entry key="DoInsideDoPrivileged" value="true" />
-        <entry key="DontCatchIllegalMonitorStateException" value="true" />
-        <entry key="DontIgnoreResultOfPutIfAbsent" value="true" />
-        <entry key="DontUseEnum" value="true" />
-        <entry key="DroppedException" value="true" />
-        <entry key="DumbMethodInvocations" value="true" />
-        <entry key="DumbMethods" value="true" />
-        <entry key="DuplicateBranches" value="true" />
-        <entry key="EmptyZipFileEntry" value="true" />
-        <entry key="EqualsOperandShouldHaveClassCompatibleWithThis" value="true" />
-        <entry key="ExplicitSerialization" value="true" />
-        <entry key="FieldItemSummary" value="true" />
-        <entry key="FinalizerNullsFields" value="true" />
-        <entry key="FindBadCast2" value="true" />
-        <entry key="FindBadForLoop" value="true" />
-        <entry key="FindBugsSummaryStats" value="true" />
-        <entry key="FindCircularDependencies" value="false" />
-        <entry key="FindDeadLocalStores" value="true" />
-        <entry key="FindDoubleCheck" value="true" />
-        <entry key="FindEmptySynchronizedBlock" value="true" />
-        <entry key="FindFieldSelfAssignment" value="true" />
-        <entry key="FindFinalizeInvocations" value="true" />
-        <entry key="FindFloatEquality" value="true" />
-        <entry key="FindFloatMath" value="false" />
-        <entry key="FindHEmismatch" value="true" />
-        <entry key="FindInconsistentSync2" value="true" />
-        <entry key="FindJSR166LockMonitorenter" value="true" />
-        <entry key="FindLocalSelfAssignment2" value="true" />
-        <entry key="FindMaskedFields" value="true" />
-        <entry key="FindMismatchedWaitOrNotify" value="true" />
-        <entry key="FindNakedNotify" value="true" />
-        <entry key="FindNonSerializableStoreIntoSession" value="false" />
-        <entry key="FindNonSerializableValuePassedToWriteObject" value="false" />
-        <entry key="FindNonShortCircuit" value="true" />
-        <entry key="FindNullDeref" value="true" />
-        <entry key="FindNullDerefsInvolvingNonShortCircuitEvaluation" value="true" />
-        <entry key="FindOpenStream" value="true" />
-        <entry key="FindPuzzlers" value="true" />
-        <entry key="FindRefComparison" value="true" />
-        <entry key="FindReturnRef" value="true" />
-        <entry key="FindRunInvocations" value="true" />
-        <entry key="FindSelfComparison" value="true" />
-        <entry key="FindSelfComparison2" value="true" />
-        <entry key="FindSleepWithLockHeld" value="true" />
-        <entry key="FindSpinLoop" value="true" />
-        <entry key="FindSqlInjection" value="true" />
-        <entry key="FindTwoLockWait" value="true" />
-        <entry key="FindUncalledPrivateMethods" value="true" />
-        <entry key="FindUnconditionalWait" value="true" />
-        <entry key="FindUninitializedGet" value="true" />
-        <entry key="FindUnrelatedTypesInGenericContainer" value="true" />
-        <entry key="FindUnreleasedLock" value="true" />
-        <entry key="FindUnsatisfiedObligation" value="true" />
-        <entry key="FindUnsyncGet" value="true" />
-        <entry key="FindUseOfNonSerializableValue" value="true" />
-        <entry key="FindUselessControlFlow" value="true" />
-        <entry key="FormatStringChecker" value="true" />
-        <entry key="FunctionsThatMightBeMistakenForProcedures" value="true" />
-        <entry key="HugeSharedStringConstants" value="true" />
-        <entry key="IDivResultCastToDouble" value="true" />
-        <entry key="IncompatMask" value="true" />
-        <entry key="InconsistentAnnotations" value="true" />
-        <entry key="InefficientMemberAccess" value="false" />
-        <entry key="InefficientToArray" value="true" />
-        <entry key="InfiniteLoop" value="true" />
-        <entry key="InfiniteRecursiveLoop" value="true" />
-        <entry key="InheritanceUnsafeGetResource" value="true" />
-        <entry key="InitializationChain" value="true" />
-        <entry key="InitializeNonnullFieldsInConstructor" value="true" />
-        <entry key="InstantiateStaticClass" value="true" />
-        <entry key="IntCast2LongAsInstant" value="true" />
-        <entry key="InvalidJUnitTest" value="true" />
-        <entry key="IteratorIdioms" value="true" />
-        <entry key="LazyInit" value="true" />
-        <entry key="LoadOfKnownNullValue" value="true" />
-        <entry key="LostLoggerDueToWeakReference" value="true" />
-        <entry key="MethodReturnCheck" value="true" />
-        <entry key="Methods" value="true" />
-        <entry key="MultithreadedInstanceAccess" value="true" />
-        <entry key="MutableLock" value="true" />
-        <entry key="MutableStaticFields" value="true" />
-        <entry key="Naming" value="true" />
-        <entry key="Noise" value="false" />
-        <entry key="NoiseNullDeref" value="false" />
-        <entry key="NoteAnnotationRetention" value="true" />
-        <entry key="NoteCheckReturnValueAnnotations" value="true" />
-        <entry key="NoteDirectlyRelevantTypeQualifiers" value="true" />
-        <entry key="NoteJCIPAnnotation" value="true" />
-        <entry key="NoteNonNullAnnotations" value="true" />
-        <entry key="NoteNonnullReturnValues" value="true" />
-        <entry key="NoteSuppressedWarnings" value="true" />
-        <entry key="NoteUnconditionalParamDerefs" value="true" />
-        <entry key="NumberConstructor" value="true" />
-        <entry key="OverridingEqualsNotSymmetrical" value="true" />
-        <entry key="PreferZeroLengthArrays" value="true" />
-        <entry key="PublicSemaphores" value="false" />
-        <entry key="QuestionableBooleanAssignment" value="true" />
-        <entry key="ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass" value="true" />
-        <entry key="ReadReturnShouldBeChecked" value="true" />
-        <entry key="RedundantInterfaces" value="true" />
-        <entry key="ReflectiveClasses" value="true" />
-        <entry key="RepeatedConditionals" value="true" />
-        <entry key="ResolveAllReferences" value="false" />
-        <entry key="RuntimeExceptionCapture" value="true" />
-        <entry key="SerializableIdiom" value="true" />
-        <entry key="StartInConstructor" value="true" />
-        <entry key="StaticCalendarDetector" value="true" />
-        <entry key="StringConcatenation" value="true" />
-        <entry key="SuperfluousInstanceOf" value="true" />
-        <entry key="SuspiciousThreadInterrupted" value="true" />
-        <entry key="SwitchFallthrough" value="true" />
-        <entry key="SynchronizationOnSharedBuiltinConstant" value="true" />
-        <entry key="SynchronizeAndNullCheckField" value="true" />
-        <entry key="SynchronizeOnClassLiteralNotGetClass" value="true" />
-        <entry key="SynchronizingOnContentsOfFieldToProtectField" value="true" />
-        <entry key="TestASM" value="false" />
-        <entry key="TestDataflowAnalysis" value="false" />
-        <entry key="TestingGround" value="false" />
-        <entry key="TestingGround2" value="false" />
-        <entry key="TrainFieldStoreTypes" value="true" />
-        <entry key="TrainLongInstantfParams" value="true" />
-        <entry key="TrainNonNullAnnotations" value="true" />
-        <entry key="TrainUnconditionalDerefParams" value="true" />
-        <entry key="URLProblems" value="true" />
-        <entry key="UncallableMethodOfAnonymousClass" value="true" />
-        <entry key="UnnecessaryMath" value="true" />
-        <entry key="UnreadFields" value="true" />
-        <entry key="UselessSubclassMethod" value="false" />
-        <entry key="VarArgsProblems" value="true" />
-        <entry key="VolatileUsage" value="true" />
-        <entry key="WaitInLoop" value="true" />
-        <entry key="WrongMapIterator" value="true" />
-        <entry key="XMLFactoryBypass" value="true" />
-      </map>
-    </option>
-    <option name="_reportCategories">
-      <map>
-        <entry key="BAD_PRACTICE" value="true" />
-        <entry key="CORRECTNESS" value="true" />
-        <entry key="EXPERIMENTAL" value="true" />
-        <entry key="I18N" value="true" />
-        <entry key="MALICIOUS_CODE" value="true" />
-        <entry key="MT_CORRECTNESS" value="true" />
-        <entry key="PERFORMANCE" value="true" />
-        <entry key="SECURITY" value="true" />
-        <entry key="STYLE" value="true" />
-      </map>
-    </option>
-  </component>
-</module>
-
diff --git a/TabSwitch.ipr b/TabSwitch.ipr
deleted file mode 100644
index 8d0f3f7..0000000
--- a/TabSwitch.ipr
+++ /dev/null
@@ -1,454 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CCaseConfig">
-    <option name="checkoutReserved" value="false" />
-    <option name="markExternalChangeAsUpToDate" value="true" />
-    <option name="checkInUseHijack" value="true" />
-    <option name="useUcmModel" value="true" />
-    <option name="synchOutside" value="false" />
-    <option name="isHistoryResticted" value="true" />
-    <option name="useIdenticalSwitch" value="true" />
-    <option name="synchActivitiesOnRefresh" value="true" />
-    <option name="lastScr" value="" />
-    <option name="scrTextFileName" value="" />
-    <option name="historyRevisionsNumber" value="4" />
-  </component>
-  <component name="ClearCaseSharedConfig">
-    <option name="myUseUcmModel" value="true" />
-  </component>
-  <component name="CompilerConfiguration">
-    <option name="DEFAULT_COMPILER" value="Javac" />
-    <resourceExtensions />
-    <wildcardResourcePatterns>
-      <entry name="?*.properties" />
-      <entry name="?*.xml" />
-      <entry name="?*.gif" />
-      <entry name="?*.png" />
-      <entry name="?*.jpeg" />
-      <entry name="?*.jpg" />
-      <entry name="?*.html" />
-      <entry name="?*.dtd" />
-      <entry name="?*.tld" />
-      <entry name="?*.ftl" />
-    </wildcardResourcePatterns>
-    <annotationProcessing>
-      <profile default="true" name="Default" enabled="false">
-        <processorPath useClasspath="true" />
-      </profile>
-    </annotationProcessing>
-  </component>
-  <component name="CopyrightManager" default="" />
-  <component name="DependencyValidationManager">
-    <option name="SKIP_IMPORT_STATEMENTS" value="false" />
-  </component>
-  <component name="Encoding" useUTFGuessing="true" native2AsciiForPropertiesFiles="false" />
-  <component name="EntryPointsManager">
-    <entry_points version="2.0" />
-  </component>
-  <component name="IdProvider" IDEtalkID="9F72A35312C6CF3B250EB31988BDBC4F" />
-  <component name="InspectionProjectProfileManager">
-    <info>
-      <option name="BACKGROUND" value="f6cb82" />
-      <option name="EFFECT_COLOR" value="ffffff" />
-      <option name="EFFECT_TYPE" value="2" />
-      <option name="myName" value="bad practice" />
-      <option name="myVal" value="50" />
-      <option name="myExternalName" value="bad practice" />
-      <option name="myDefaultAttributes">
-        <option name="EFFECT_TYPE" value="0" />
-      </option>
-    </info>
-  </component>
-  <component name="IvyIDEA.ProjectSettings">
-    <option name="artifactTypeSettings">
-      <ArtifactTypeSettings />
-    </option>
-    <option name="propertiesSettings">
-      <PropertiesSettings />
-    </option>
-  </component>
-  <component name="JavadocGenerationManager">
-    <option name="OUTPUT_DIRECTORY" />
-    <option name="OPTION_SCOPE" value="protected" />
-    <option name="OPTION_HIERARCHY" value="true" />
-    <option name="OPTION_NAVIGATOR" value="true" />
-    <option name="OPTION_INDEX" value="true" />
-    <option name="OPTION_SEPARATE_INDEX" value="true" />
-    <option name="OPTION_DOCUMENT_TAG_USE" value="false" />
-    <option name="OPTION_DOCUMENT_TAG_AUTHOR" value="false" />
-    <option name="OPTION_DOCUMENT_TAG_VERSION" value="false" />
-    <option name="OPTION_DOCUMENT_TAG_DEPRECATED" value="true" />
-    <option name="OPTION_DEPRECATED_LIST" value="true" />
-    <option name="OTHER_OPTIONS" value="" />
-    <option name="HEAP_SIZE" />
-    <option name="LOCALE" />
-    <option name="OPEN_IN_BROWSER" value="true" />
-  </component>
-  <component name="ModuleEditorState">
-    <option name="LAST_EDITED_MODULE_NAME" />
-    <option name="LAST_EDITED_TAB_NAME" />
-  </component>
-  <component name="Palette2">
-    <group name="Swing">
-      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
-      </item>
-      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
-      </item>
-      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
-      </item>
-      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.png" removable="false" auto-create-binding="false" can-attach-label="true">
-        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
-      </item>
-      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
-        <initial-values>
-          <property name="text" value="Button" />
-        </initial-values>
-      </item>
-      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
-        <initial-values>
-          <property name="text" value="RadioButton" />
-        </initial-values>
-      </item>
-      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
-        <initial-values>
-          <property name="text" value="CheckBox" />
-        </initial-values>
-      </item>
-      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
-        <initial-values>
-          <property name="text" value="Label" />
-        </initial-values>
-      </item>
-      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
-          <preferred-size width="150" height="-1" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
-          <preferred-size width="150" height="-1" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
-          <preferred-size width="150" height="-1" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
-          <preferred-size width="150" height="50" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
-          <preferred-size width="150" height="50" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
-          <preferred-size width="150" height="50" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
-      </item>
-      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
-          <preferred-size width="150" height="50" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
-          <preferred-size width="150" height="50" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
-          <preferred-size width="150" height="50" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
-          <preferred-size width="200" height="200" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
-          <preferred-size width="200" height="200" />
-        </default-constraints>
-      </item>
-      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.png" removable="false" auto-create-binding="true" can-attach-label="true">
-        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
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-        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
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-      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
-          <preferred-size width="-1" height="20" />
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-      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.png" removable="false" auto-create-binding="false" can-attach-label="false">
-        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
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-      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.png" removable="false" auto-create-binding="true" can-attach-label="false">
-        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
-      </item>
-    </group>
-  </component>
-  <component name="ProjectCodeStyleSettingsManager">
-    <option name="PER_PROJECT_SETTINGS">
-      <value>
-        <XML>
-          <option name="XML_LEGACY_SETTINGS_IMPORTED" value="true" />
-        </XML>
-      </value>
-    </option>
-    <option name="PREFERRED_PROJECT_CODE_STYLE" value="IBE-style" />
-  </component>
-  <component name="ProjectDictionaryState">
-    <dictionary name="must" />
-  </component>
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/TabSwitch.iml" filepath="$PROJECT_DIR$/TabSwitch.iml" />
-    </modules>
-  </component>
-  <component name="ProjectResources">
-    <default-html-doctype>http://www.w3.org/1999/xhtml</default-html-doctype>
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" assert-keyword="true" jdk-15="true" project-jdk-name="IDEA IU-135.475" project-jdk-type="IDEA JDK">
-    <output url="file://$PROJECT_DIR$/out" />
-  </component>
-  <component name="VcsDirectoryMappings">
-    <mapping directory="" vcs="" />
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-  </component>
-  <component name="WebServicesPlugin" addRequiredLibraries="true" />
-  <component name="org.twodividedbyzero.idea.findbugs">
-    <option name="annotationTypeSettings">
-      <map>
-        <entry key="ExpPriority" value="-16777216;-1;-8355712;WAVE_UNDERSCORE;0;" />
-        <entry key="HighPriority" value="-65536;-1;-65536;WAVE_UNDERSCORE;1;" />
-        <entry key="IgnorePriority" value="-16777216;-1;-8650628;WAVE_UNDERSCORE;0;" />
-        <entry key="LowPriority" value="-16777216;-1;-16711936;BOXED;0;" />
-        <entry key="NormalPriority" value="-16777216;-1;-5066240;WAVE_UNDERSCORE;2;" />
-      </map>
-    </option>
-    <option name="_basePreferences">
-      <map>
-        <entry key="property.analysisEffortLevel" value="default" />
-        <entry key="property.analyzeAfterCompile" value="false" />
-        <entry key="property.annotationGutterIconEnabled" value="true" />
-        <entry key="property.annotationSuppressWarningsClass" value="edu.umd.cs.findbugs.annotations.SuppressFBWarnings" />
-        <entry key="property.annotationTextRangeMarkupEnabled" value="true" />
-        <entry key="property.exportAsHtml" value="true" />
-        <entry key="property.exportAsXml" value="true" />
-        <entry key="property.exportBaseDir" value="" />
-        <entry key="property.exportCreateArchiveDir" value="false" />
-        <entry key="property.exportOpenBrowser" value="true" />
-        <entry key="property.minPriorityToReport" value="Medium" />
-        <entry key="property.runAnalysisInBackground" value="false" />
-        <entry key="property.showHiddenDetectors" value="false" />
-        <entry key="property.toolWindowEditorPreview" value="true" />
-        <entry key="property.toolWindowToFront" value="true" />
-      </map>
-    </option>
-    <option name="_detectors">
-      <map>
-        <entry key="AppendingToAnObjectOutputStream" value="true" />
-        <entry key="AtomicityProblem" value="true" />
-        <entry key="BadAppletConstructor" value="false" />
-        <entry key="BadResultSetAccess" value="true" />
-        <entry key="BadSyntaxForRegularExpression" value="true" />
-        <entry key="BadUseOfReturnValue" value="true" />
-        <entry key="BadlyOverriddenAdapter" value="true" />
-        <entry key="BooleanReturnNull" value="true" />
-        <entry key="BuildInterproceduralCallGraph" value="false" />
-        <entry key="BuildObligationPolicyDatabase" value="true" />
-        <entry key="CallToUnsupportedMethod" value="false" />
-        <entry key="CalledMethods" value="true" />
-        <entry key="CheckCalls" value="false" />
-        <entry key="CheckExpectedWarnings" value="false" />
-        <entry key="CheckImmutableAnnotation" value="true" />
-        <entry key="CheckRelaxingNullnessAnnotation" value="true" />
-        <entry key="CheckTypeQualifiers" value="true" />
-        <entry key="CloneIdiom" value="true" />
-        <entry key="ComparatorIdiom" value="true" />
-        <entry key="ConfusedInheritance" value="true" />
-        <entry key="ConfusionBetweenInheritedAndOuterMethod" value="true" />
-        <entry key="CrossSiteScripting" value="true" />
-        <entry key="DefaultEncodingDetector" value="true" />
-        <entry key="DoInsideDoPrivileged" value="true" />
-        <entry key="DontCatchIllegalMonitorStateException" value="true" />
-        <entry key="DontIgnoreResultOfPutIfAbsent" value="true" />
-        <entry key="DontUseEnum" value="true" />
-        <entry key="DroppedException" value="true" />
-        <entry key="DumbMethodInvocations" value="true" />
-        <entry key="DumbMethods" value="true" />
-        <entry key="DuplicateBranches" value="true" />
-        <entry key="EmptyZipFileEntry" value="true" />
-        <entry key="EqualsOperandShouldHaveClassCompatibleWithThis" value="true" />
-        <entry key="ExplicitSerialization" value="true" />
-        <entry key="FieldItemSummary" value="true" />
-        <entry key="FinalizerNullsFields" value="true" />
-        <entry key="FindBadCast2" value="true" />
-        <entry key="FindBadForLoop" value="true" />
-        <entry key="FindBugsSummaryStats" value="true" />
-        <entry key="FindCircularDependencies" value="false" />
-        <entry key="FindDeadLocalStores" value="true" />
-        <entry key="FindDoubleCheck" value="true" />
-        <entry key="FindEmptySynchronizedBlock" value="true" />
-        <entry key="FindFieldSelfAssignment" value="true" />
-        <entry key="FindFinalizeInvocations" value="true" />
-        <entry key="FindFloatEquality" value="true" />
-        <entry key="FindFloatMath" value="false" />
-        <entry key="FindHEmismatch" value="true" />
-        <entry key="FindInconsistentSync2" value="true" />
-        <entry key="FindJSR166LockMonitorenter" value="true" />
-        <entry key="FindLocalSelfAssignment2" value="true" />
-        <entry key="FindMaskedFields" value="true" />
-        <entry key="FindMismatchedWaitOrNotify" value="true" />
-        <entry key="FindNakedNotify" value="true" />
-        <entry key="FindNonSerializableStoreIntoSession" value="false" />
-        <entry key="FindNonSerializableValuePassedToWriteObject" value="false" />
-        <entry key="FindNonShortCircuit" value="true" />
-        <entry key="FindNullDeref" value="true" />
-        <entry key="FindNullDerefsInvolvingNonShortCircuitEvaluation" value="true" />
-        <entry key="FindOpenStream" value="true" />
-        <entry key="FindPuzzlers" value="true" />
-        <entry key="FindRefComparison" value="true" />
-        <entry key="FindReturnRef" value="true" />
-        <entry key="FindRunInvocations" value="true" />
-        <entry key="FindSelfComparison" value="true" />
-        <entry key="FindSelfComparison2" value="true" />
-        <entry key="FindSleepWithLockHeld" value="true" />
-        <entry key="FindSpinLoop" value="true" />
-        <entry key="FindSqlInjection" value="true" />
-        <entry key="FindTwoLockWait" value="true" />
-        <entry key="FindUncalledPrivateMethods" value="true" />
-        <entry key="FindUnconditionalWait" value="true" />
-        <entry key="FindUninitializedGet" value="true" />
-        <entry key="FindUnrelatedTypesInGenericContainer" value="true" />
-        <entry key="FindUnreleasedLock" value="true" />
-        <entry key="FindUnsatisfiedObligation" value="true" />
-        <entry key="FindUnsyncGet" value="true" />
-        <entry key="FindUseOfNonSerializableValue" value="true" />
-        <entry key="FindUselessControlFlow" value="true" />
-        <entry key="FormatStringChecker" value="true" />
-        <entry key="FunctionsThatMightBeMistakenForProcedures" value="true" />
-        <entry key="HugeSharedStringConstants" value="true" />
-        <entry key="IDivResultCastToDouble" value="true" />
-        <entry key="IncompatMask" value="true" />
-        <entry key="InconsistentAnnotations" value="true" />
-        <entry key="InefficientMemberAccess" value="false" />
-        <entry key="InefficientToArray" value="true" />
-        <entry key="InfiniteLoop" value="true" />
-        <entry key="InfiniteRecursiveLoop" value="true" />
-        <entry key="InheritanceUnsafeGetResource" value="true" />
-        <entry key="InitializationChain" value="true" />
-        <entry key="InitializeNonnullFieldsInConstructor" value="true" />
-        <entry key="InstantiateStaticClass" value="true" />
-        <entry key="IntCast2LongAsInstant" value="true" />
-        <entry key="InvalidJUnitTest" value="true" />
-        <entry key="IteratorIdioms" value="true" />
-        <entry key="LazyInit" value="true" />
-        <entry key="LoadOfKnownNullValue" value="true" />
-        <entry key="LostLoggerDueToWeakReference" value="true" />
-        <entry key="MethodReturnCheck" value="true" />
-        <entry key="Methods" value="true" />
-        <entry key="MultithreadedInstanceAccess" value="true" />
-        <entry key="MutableLock" value="true" />
-        <entry key="MutableStaticFields" value="true" />
-        <entry key="Naming" value="true" />
-        <entry key="Noise" value="false" />
-        <entry key="NoiseNullDeref" value="false" />
-        <entry key="NoteAnnotationRetention" value="true" />
-        <entry key="NoteCheckReturnValueAnnotations" value="true" />
-        <entry key="NoteDirectlyRelevantTypeQualifiers" value="true" />
-        <entry key="NoteJCIPAnnotation" value="true" />
-        <entry key="NoteNonNullAnnotations" value="true" />
-        <entry key="NoteNonnullReturnValues" value="true" />
-        <entry key="NoteSuppressedWarnings" value="true" />
-        <entry key="NoteUnconditionalParamDerefs" value="true" />
-        <entry key="NumberConstructor" value="true" />
-        <entry key="OverridingEqualsNotSymmetrical" value="true" />
-        <entry key="PreferZeroLengthArrays" value="true" />
-        <entry key="PublicSemaphores" value="false" />
-        <entry key="QuestionableBooleanAssignment" value="true" />
-        <entry key="ReadOfInstanceFieldInMethodInvokedByConstructorInSuperclass" value="true" />
-        <entry key="ReadReturnShouldBeChecked" value="true" />
-        <entry key="RedundantInterfaces" value="true" />
-        <entry key="ReflectiveClasses" value="true" />
-        <entry key="RepeatedConditionals" value="true" />
-        <entry key="ResolveAllReferences" value="false" />
-        <entry key="RuntimeExceptionCapture" value="true" />
-        <entry key="SerializableIdiom" value="true" />
-        <entry key="StartInConstructor" value="true" />
-        <entry key="StaticCalendarDetector" value="true" />
-        <entry key="StringConcatenation" value="true" />
-        <entry key="SuperfluousInstanceOf" value="true" />
-        <entry key="SuspiciousThreadInterrupted" value="true" />
-        <entry key="SwitchFallthrough" value="true" />
-        <entry key="SynchronizationOnSharedBuiltinConstant" value="true" />
-        <entry key="SynchronizeAndNullCheckField" value="true" />
-        <entry key="SynchronizeOnClassLiteralNotGetClass" value="true" />
-        <entry key="SynchronizingOnContentsOfFieldToProtectField" value="true" />
-        <entry key="TestASM" value="false" />
-        <entry key="TestDataflowAnalysis" value="false" />
-        <entry key="TestingGround" value="false" />
-        <entry key="TestingGround2" value="false" />
-        <entry key="TrainFieldStoreTypes" value="true" />
-        <entry key="TrainLongInstantfParams" value="true" />
-        <entry key="TrainNonNullAnnotations" value="true" />
-        <entry key="TrainUnconditionalDerefParams" value="true" />
-        <entry key="URLProblems" value="true" />
-        <entry key="UncallableMethodOfAnonymousClass" value="true" />
-        <entry key="UnnecessaryMath" value="true" />
-        <entry key="UnreadFields" value="true" />
-        <entry key="UselessSubclassMethod" value="false" />
-        <entry key="VarArgsProblems" value="true" />
-        <entry key="VolatileUsage" value="true" />
-        <entry key="WaitInLoop" value="true" />
-        <entry key="WrongMapIterator" value="true" />
-        <entry key="XMLFactoryBypass" value="true" />
-      </map>
-    </option>
-    <option name="_reportCategories">
-      <map>
-        <entry key="BAD_PRACTICE" value="true" />
-        <entry key="CORRECTNESS" value="true" />
-        <entry key="EXPERIMENTAL" value="true" />
-        <entry key="I18N" value="true" />
-        <entry key="MALICIOUS_CODE" value="true" />
-        <entry key="MT_CORRECTNESS" value="true" />
-        <entry key="PERFORMANCE" value="true" />
-        <entry key="SECURITY" value="true" />
-        <entry key="STYLE" value="true" />
-      </map>
-    </option>
-    <option name="_annotationTypeSettings">
-      <map>
-        <entry key="ExpPriority" value="-16777216;-1;-8355712;WAVE_UNDERSCORE;0;" />
-        <entry key="HighPriority" value="-65536;-1;-65536;WAVE_UNDERSCORE;1;" />
-        <entry key="IgnorePriority" value="-16777216;-1;-8650628;WAVE_UNDERSCORE;0;" />
-        <entry key="LowPriority" value="-16777216;-1;-16711936;BOXED;0;" />
-        <entry key="NormalPriority" value="-16777216;-1;-5066240;WAVE_UNDERSCORE;2;" />
-      </map>
-    </option>
-  </component>
-</project>
-
diff --git a/build.xml b/build.xml
index 2cd6892..f04cd33 100644
--- a/build.xml
+++ b/build.xml
@@ -27,6 +27,7 @@
       <include name="javac2.jar"/>
       <include name="asm.jar"/>
       <include name="asm4-all.jar"/>
+      <include name="asm-all.jar"/>
       <include name="asm-commons.jar"/>
     </fileset>
   </path>
diff --git a/src/org/intellij/ideaplugins/tabswitch/action/SwitchTabAction.java b/src/org/intellij/ideaplugins/tabswitch/action/SwitchTabAction.java
index 5a614d0..725e102 100644
--- a/src/org/intellij/ideaplugins/tabswitch/action/SwitchTabAction.java
+++ b/src/org/intellij/ideaplugins/tabswitch/action/SwitchTabAction.java
@@ -15,6 +15,7 @@
  */
 package org.intellij.ideaplugins.tabswitch.action;
 
+import org.intellij.ideaplugins.tabswitch.filefetcher.OpenTabFilesFileFetcher;
 import org.jetbrains.annotations.Nullable;
 
 import com.intellij.ide.ui.UISettings;
@@ -45,7 +46,8 @@ private VirtualFile getFile(Project project, FileEditorManager fileEditorManager
     VirtualFile[] recentFiles = EditorHistoryManager.getInstance(project).getFiles();
     for (int i = recentFiles.length - 2; i >= 0; i--) {
       VirtualFile file = recentFiles[i];
-      if (showRecentFiles || fileEditorManager.isFileOpen(file)) {
+      if ((showRecentFiles || fileEditorManager.isFileOpen(file))
+              && !OpenTabFilesFileFetcher.ignoredExtensions.contains(file.getExtension())) {
         return file;
       }
     }
diff --git a/src/org/intellij/ideaplugins/tabswitch/filefetcher/OpenTabFilesFileFetcher.java b/src/org/intellij/ideaplugins/tabswitch/filefetcher/OpenTabFilesFileFetcher.java
index df0be8a..817bb9a 100644
--- a/src/org/intellij/ideaplugins/tabswitch/filefetcher/OpenTabFilesFileFetcher.java
+++ b/src/org/intellij/ideaplugins/tabswitch/filefetcher/OpenTabFilesFileFetcher.java
@@ -1,8 +1,5 @@
 package org.intellij.ideaplugins.tabswitch.filefetcher;
 
-import java.util.LinkedList;
-import java.util.List;
-
 import com.intellij.ide.ui.UISettings;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.fileEditor.impl.EditorHistoryManager;
@@ -10,10 +7,19 @@
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.util.ArrayUtil;
 
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Set;
+
 /**
  * Creates a list of {@link VirtualFile} by fetching all the files that are open in tabs in current project.
  */
 public class OpenTabFilesFileFetcher implements FileFetcher<VirtualFile> {
+  public static Set<String> ignoredExtensions = new HashSet<>();
+  static {
+    ignoredExtensions.add("class");
+  }
 
   @Override
   public List<VirtualFile> getFiles(Project project) {
@@ -25,7 +31,8 @@ private List<VirtualFile> getOpenFiles(FileEditorManager fileEditorManager, Virt
     List<VirtualFile> openFiles = new LinkedList<>();
     int editorTabLimit = UISettings.getInstance().EDITOR_TAB_LIMIT;
     for (VirtualFile file : recentFiles) {
-      if (openFiles.size() <= editorTabLimit && fileEditorManager.isFileOpen(file) && !openFiles.contains(file)) {
+      if (openFiles.size() <= editorTabLimit && fileEditorManager.isFileOpen(file) && !openFiles.contains(file)
+              && !ignoredExtensions.contains(file.getExtension())) {
         openFiles.add(file);
       }
     }