java.lang.ClassCastException: javax.swing.tree.DefaultMutableTreeNode cannot be cast to org.netbeans.modules.languages.fold.LanguagesNavigator$NavigatorNode
	at org.netbeans.modules.languages.fold.LanguagesNavigator.selectionChanged(LanguagesNavigator.java:338)
	at org.netbeans.modules.languages.fold.LanguagesNavigator.access$100(LanguagesNavigator.java:77)
	at org.netbeans.modules.languages.fold.LanguagesNavigator$3.focusGained(LanguagesNavigator.java:120)
	at java.awt.AWTEventMulticaster.focusGained(AWTEventMulticaster.java:203)
	at java.awt.Component.processFocusEvent(Component.java:5927)
	at java.awt.Component.processEvent(Component.java:5794)
	at java.awt.Container.processEvent(Container.java:2058)
	at java.awt.Component.dispatchEventImpl(Component.java:4410)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4240)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1848)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:869)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:501)
	at java.awt.Component.dispatchEventImpl(Component.java:4282)
	at java.awt.Container.dispatchEventImpl(Container.java:2116)
	at java.awt.Component.dispatchEvent(Component.java:4240)
[catch] at sun.awt.X11.XWindow$1.run(XWindow.java:352)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)