I know it's not a problem with the installer, because Limewire WAS working and then stopped.

I justr tried installing Beta.
Same problem. I'm not getting an error - but it does create the error log each time. Is there anything else I can try?

#
# An unexpected error has been detected by Java Runtime Environment:
#
# EXCEPTION_STACK_OVERFLOW (0xc00000fd) at pc=0x033ca497, pid=5412, tid=5504
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0-b105 mixed mode, sharing)
# Problematic frame:
# C [nvappfilter.dll+0xa497]