java.lang.Throwable: Can't unlock file Windows2Local/Modes/.nbattrs, it's lock was not found or it wasn't locked.
        at org.netbeans.core.startup.layers.LocalFileSystemEx.unlock(LocalFileSystemEx.java:182)
        at org.openide.filesystems.LocalFileSystem$Impl.unlock(LocalFileSystem.java:666)
        at org.openide.filesystems.DefaultAttributes.deleteFile(DefaultAttributes.java:774)
        at org.openide.filesystems.DefaultAttributes.saveTable(DefaultAttributes.java:601)
        at org.openide.filesystems.DefaultAttributes.writeAttribute(DefaultAttributes.java:436)
        at org.netbeans.core.startup.layers.LocalFileSystemEx$DelegatingAttributes.writeAttribute(LocalFileSystemEx.java:207)
        at org.openide.filesystems.AbstractFileObject.setAttribute(AbstractFileObject.java:350)
        at org.openide.filesystems.MultiFileObject.setAttribute(MultiFileObject.java:875)
        at org.openide.filesystems.MultiFileObject.setAttribute(MultiFileObject.java:875)
        at org.openide.filesystems.MultiFileObject.setAttribute(MultiFileObject.java:845)
        at org.netbeans.core.windows.persistence.ModeParser.writeOrder(ModeParser.java:553)
        at org.netbeans.core.windows.persistence.ModeParser.readTCRefs(ModeParser.java:293)
        at org.netbeans.core.windows.persistence.ModeParser.load(ModeParser.java:141)
        at org.netbeans.core.windows.persistence.WindowManagerParser.readModes(WindowManagerParser.java:441)
        at org.netbeans.core.windows.persistence.WindowManagerParser.load(WindowManagerParser.java:108)
        at org.netbeans.core.windows.persistence.PersistenceManager.loadWindowSystem(PersistenceManager.java:1107)
        at org.netbeans.core.windows.PersistenceHandler.load(PersistenceHandler.java:118)
        at org.netbeans.core.windows.WindowSystemImpl.load(WindowSystemImpl.java:69)
        at org.netbeans.core.NonGui$2.run(NonGui.java:188)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:284)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)