Have you tried reinstalling Limewire ?

Also

What version are you using ? and is your Java up to date ?

I had a lot of trouble with 10.0.5 myself, pretty similar but not to the extent that you are talking about. I downgraded to 4.9.37 which I find more stable

Also if you don't let Limewire close down normally then the chances of losing incomplete downloads are very high.

What makes you have to shut it down using Taskmanager or Restart ?