Jbuilder suddenly won't work

Hello,
After using Jbuilder X Foundation happily for several weeks it suddenly refused to work this afternoon. The problem seems to be that it can no longer open/display files. When launched from the command prompt, a number of NullPointerExeptions occur. These are in the form
"Null pointerExeption at com.borland.primetime......"
I haven't listed the whole thing as I've already searched pretty hard on the www, and this string seems not to appear any where obvious. (or not obvious as it goes)
Initially I thought it was something silly that I did, and have tried pretty much everything I can think of. New install of both JBXF and the SDK from sun, even update install of Windows. But no, what to do?
If anyone here has experience of this or ideally a sollution, I'd be greatfull.
Yours kindly (with a classpath intact)
Adam Green

Nope, it's not having it...
Instead, I've switched to JBuilder 9 personal, and it's fine.
Fingers Crossed
Adam G

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