Your actually the second person that has said that there files have disappeared, the other person found them in their programs folder
This could be some sort of new bug...
Did you try clicking on one of the files in your lw library and then click explore...What happens when you do this, what opens up for you ???
Check this thread out as to how this person fixed the same sort of issue...
http://www.gnutellaforums.com/showth...9557post259557