I asked a similar question earlier and the response was basically delete them all from the transfer list, because it is unlikely that they will ever show up. The large number of file searches consumes resources on your computer and eats up bandwidth.

I wish I had better news, but I am in the same boat as you.

I've used Xolox for almost a year now, and I notice that each new version seems to decrease the success of actually downloading a file. Maybe its just the Gnutella network, or other file sharing programs behaving badly. I seem to get hits when I search for files, but come up empty when trying to download them.