Stencyl Error

Unexpected problem on thread AWT-EventQueue-0: Parameter 'directory' is not a directory
java.lang.IllegalArgumentException: Parameter 'directory' is not a directory
	at org.apache.commons.io.FileUtils.validateListFilesParameters(FileUtils.java:545)
	at org.apache.commons.io.FileUtils.listFiles(FileUtils.java:521)
	at org.apache.commons.io.FileUtils.listFiles(FileUtils.java:691)
	at stencyl.sw.app.ExtensionManager.get(ExtensionManager.java:35)
	at stencyl.sw.app.Menu.refreshExtensionsMenu(Menu.java:511)
	at stencyl.sw.app.Menu.<init>(Menu.java:126)
	at stencyl.sw.SW.initMenu(SW.java:449)
	at stencyl.sw.SW.showWindow(SW.java:632)
	at stencyl.sw.SW.get(SW.java:194)
	at stencyl.sw.SW$1.run(SW.java:183)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$000(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.awt.EventQueue$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)