I also have this problem, and if I sit and watch I can see limewire die. I've tried everything in the fix it thread and no joy. If you look in the limewire directory you'll see log files, and the thrust of the message will likely be:
# An unexpected error has been detected by HotSpot Virtual Machine:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x10004bd0, pid=2060, tid=2768

And a core dump. I've yet to see a solution to this, I had to downgrade to 4.8 to get limewire to work. And now I mainly use - Shareaza.