Wuala crashed after trying to open Wuala group. Wuala won't start now.

I upgraded to build 439. I tried to open the Wuala group to get release note information. But instead of the Group opening, Wuala crashed. Now every time I try to restart Wuala, I get the following error:

Build: WualaPC 439
App: Domain Application, user: xxxxxxx
(Data Application, prim id: xxx.xx.x.x, ip: /xx.xxx.xxx.xxx:7222 (global)
(Common Application Alpha WualaPC 439))
Date: Jun 12, 2008
OS: Windows XP 1.6.0_02 Sun Microsystems Inc.
Memory: 254 MB max 4.3 MB free 16 MB total
Local Host: Hippo/192.168.1.70
Running for: 2s 360ms

Exception: java.lang.Exception: com.wuala.common.exception.ApplicationRuntimeException
at com.wuala.obfuscated.nk.a(Z:169)
at com.wuala.common.exception.ApplicationRuntimeException.createReport(Z:62)
at com.wuala.obfuscated.RS.<init>(Z:30)
at com.wuala.obfuscated.fa.a(Z:286)
at com.wuala.obfuscated.fa.a(Z:164)
at com.wuala.obfuscated.fa.a(Z:117)
at com.wuala.platform.Wuala.launch(Z:94)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.wuala.starter.ReflectiveWrapper.invoke(ReflectiveWrapper.java:38)
at com.wuala.starter.ApplicationWrapper.launch(ApplicationWrapper.java:19)
at com.wuala.starter.WualaStarter.startWuala(WualaStarter.java:117)
at com.wuala.starter.WinWualaStarter.startWuala(WinWualaStarter.java:88)
at com.wuala.starter.WualaStarter.run(WualaStarter.java:35)
at com.wuala.starter.WinWualaStarter.run(WinWualaStarter.java:76)
Caused by: com.wuala.common.exception.ApplicationRuntimeException
... 13 more
Caused by: java.lang.NullPointerException
at com.wuala.common.domain.KeyKey.<init>(Z:29)
at com.wuala.obfuscated.IQ.a(Z:585)
at com.wuala.obfuscated.IQ.g(Z:301)
at com.wuala.obfuscated.xG.tH(Z:192)
at com.wuala.obfuscated.Mk.run(Z:236)
at org.eclipse.swt.widgets.RunnableLock.run(Unknown Source)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at com.wuala.obfuscated.fa.a(Z:133)
... 12 more

--------------------------------------------

com.wuala.common.exception.ApplicationRuntimeException
at com.wuala.obfuscated.fa.a(Z:164)
at com.wuala.obfuscated.fa.a(Z:117)
at com.wuala.platform.Wuala.launch(Z:94)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.wuala.starter.ReflectiveWrapper.invoke(ReflectiveWrapper.java:38)
at com.wuala.starter.ApplicationWrapper.launch(ApplicationWrapper.java:19)
at com.wuala.starter.WualaStarter.startWuala(WualaStarter.java:117)
at com.wuala.starter.WinWualaStarter.startWuala(WinWualaStarter.java:88)
at com.wuala.starter.WualaStarter.run(WualaStarter.java:35)
at com.wuala.starter.WinWualaStarter.run(WinWualaStarter.java:76)
Caused by: java.lang.NullPointerException
at com.wuala.common.domain.KeyKey.<init>(Z:29)
at com.wuala.obfuscated.IQ.a(Z:585)
at com.wuala.obfuscated.IQ.g(Z:301)
at com.wuala.obfuscated.xG.tH(Z:192)
at com.wuala.obfuscated.Mk.run(Z:236)
at org.eclipse.swt.widgets.RunnableLock.run(Unknown Source)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at com.wuala.obfuscated.fa.a(Z:133)
... 12 more

--------------------------------------------

java.lang.NullPointerException
at com.wuala.common.domain.KeyKey.<init>(Z:29)
at com.wuala.obfuscated.IQ.a(Z:585)
at com.wuala.obfuscated.IQ.g(Z:301)
at com.wuala.obfuscated.xG.tH(Z:192)
at com.wuala.obfuscated.Mk.run(Z:236)
at org.eclipse.swt.widgets.RunnableLock.run(Unknown Source)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at com.wuala.obfuscated.fa.a(Z:133)
at com.wuala.obfuscated.fa.a(Z:117)
at com.wuala.platform.Wuala.launch(Z:94)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.wuala.starter.ReflectiveWrapper.invoke(ReflectiveWrapper.java:38)
at com.wuala.starter.ApplicationWrapper.launch(ApplicationWrapper.java:19)
at com.wuala.starter.WualaStarter.startWuala(WualaStarter.java:117)
at com.wuala.starter.WinWualaStarter.startWuala(WinWualaStarter.java:88)
at com.wuala.starter.WualaStarter.run(WualaStarter.java:35)
at com.wuala.starter.WinWualaStarter.run(WinWualaStarter.java:76)

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