[3.3.1] Can't open CrashCourse (Weird problems)

After downloading CrashCourse Kit and opening it in Stencyl this message shows up:
http://i.imgur.com/tMgM1z8.png?1
When I click Upgrade and Continue the small 'saving...' window  shows up for few seconds and this message appears:
http://i.imgur.com/RokJN43.png?1

It happens with, I think, every game I downloaded from Stencyl Forge. Games made by me work fine. What is the problem? I reinstalled the newest version of Stencyl couple of times, but there is always the same problem. Could you tell me how to fix it? Pretty please... 

Details:
Unexpected problem on thread AWT-EventQueue-0: java.lang.NullPointerException
java.lang.RuntimeException: java.lang.NullPointerException
   at stencyl.sw.app.tasks.StencylWorker.done(StencylWorker.java:74)
   at stencyl.sw.app.tasks.StencylWorker.done(StencylWorker.java:54)
   at javax.swing.SwingWorker$5.run(Unknown Source)
   at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(Unknown Source)
   at sun.swing.AccumulativeRunnable.run(Unknown Source)
   at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(Unknown Source)
   at javax.swing.Timer.fireActionPerformed(Unknown Source)
   at javax.swing.Timer$DoPostEvent.run(Unknown Source)
   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)
Caused by: java.lang.NullPointerException
   at stencyl.sw.io.write.resource.SceneWriter.writeXML(SceneWriter.java:576)
   at stencyl.sw.io.write.resource.SceneWriter.write(SceneWriter.java:76)
   at stencyl.sw.app.tasks.UpdateScenesTask.doInBackground(UpdateScenesTask.java:39)
   at stencyl.sw.app.tasks.UpdateScenesTask.doInBackground(UpdateScenesTask.java:12)
   at javax.swing.SwingWorker$1.call(Unknown Source)
   at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
   at java.util.concurrent.FutureTask.run(Unknown Source)
   at javax.swing.SwingWorker.run(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
   at java.lang.Thread.run(Unknown Source)[/size]

Looks like the same problem as reported here: http://community.stencyl.com/index.php/topic,41857.0.html

Should be fixed in the private build. If you want to upgrade your game/kit, you can send it to me.