Try changing Java versions. You can either update to the latest version here: Java SE Downloads
or, if the latest update doesn't help, try this older version: Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11
Whichever Java version you use, download the JRE offline installer & remove any other Java versions before installing another one.

If changing Java doesn't help, delete LW's preferences folder when LW's properly closed.
This will change all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.
Vista users: LimeWire Pref Folder in Vista