Make a note of your settings & try deleting your LW Preferences folder whilst LW is closed; instructions here: Point #2 & 3 in Fixes for Limewire (sample image included at bottom of page.) Next time you open LW, you will need to reset all your options so 1st make a note of where your download folder is & other worthy settings.

Also see License requirement (click on link) & make a note of the settings suggested.

I presume you have LW version 4.12.4 right?