Have you tried deleting your incomplete folder whilst limewire is closed. I measn the entire thing. Limewire will create a new one automaticly I have been told (never tried it myself, but will try it soon as I am also having some problems. Not as bad as yours though)

As to files not resuming after a systems crash. This is very common when Limewire is not closed down normally. You should really have someone take a look at your system. Have you tried scanning your computer for malware, or maybe tried to post a Highjack This log in one of the computer help forums. I have used this one in the past.

www.daniweb.com

but there is also another one mentioned in this sticky:

http://www.gnutellaforums.com/showthread.php?t=41432

Hope this helps