Here's some other options to try:
1. Set up a new account. Go to System prefs -> Accounts & set up a new one. Then try LW from the 2nd account.

2. It may or may not make a difference, but try this version LimeWire cvs builds (4.13.4jum490) CVS which is an unofficial beta version. Choose the nightly release link. You will find many releases on the page that follows. Try the most recent.