fullscreen crash

[kejopo1]

I was having someone look for bugs on my server......and they decided to check off the fullscreen function in game and then restart the client as prompted by the game. Now when they launch the game it goes to a black fullscreen and crashes. Does anyone know how to turn off fullscreen without launching the client.

Things i have tried without success:
completely replacing there client folder....so apparently the setting isn't stored there.


Edit:
Found a fix......not sure y it works though

I replaced this file in C:\Documents and Settings\User\.java

see attached file.....