NetBeans exception

Hi!
5 days ago I’ve installed NetBeans, the plugin support was awesome, but now the IDE gives me an exception on startup.


java.lang.AssertionError: Not Swing Thread
	at com.elixirtech.repository.tree.RepositoryTreeModel.assertSwingThread(Unknown Source)
	at com.elixirtech.repository.tree.RepositoryTreeModel.<init>(Unknown Source)
	at com.elixirtech.arch.repository.RepositoryExplorer.buildUI(Unknown Source)
	at com.elixirtech.arch.repository.RepositoryExplorer$1.finished(Unknown Source)
[catch] at com.elixirtech.ui.SwingWorker$1.run(Unknown Source)
	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:269)
	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)

Any ideas? How to avoid this?
Thanks.