Try deleting LW's preferences folder. Make sure LW's properly closed first. Points 2 & 3 of the sticky below have instructions. If you've used much older versions of LW, you could have a folder in point 2's location...so check for both.
Fixes for LimeWire

This will kill all of your settings within options (you'll have to reset things afterwards) & revert the saved folder location to default...see if that fixes things