I'm still puzzled by the Pro problem (see http://www.gnutellaforums.com/showth...threadid=33991 ), but oh well.

So much can change in three months it's hard to pinpoint a cause.

You can revert and try a clean install (just drag the following somewhere else)
-System Folder/Preferences/.limewire folder
-System Folder/Preferences/Incomplete and Shared folders ( or wherever you have located them)
-Applicatiions/LimeWire folder
-any installers

Download the new installer from your Pro page (maybe clear IE's cache first) and it should give you a fresh start as before.

Really though, to continue p2p filesharing, OS X is the way to go. Apple has given up on java for Classic, and so much continues to advance that even LW had to give up on trying to make LW work on the old Java.