In WINDOWS ... using Windows Explorer ... go to your folder that is called INCOMPLETE. Mine is d:\incomplete. Yours is there somewhere. In it you will find all the searches you have done, plus downloads.dat and downloads.bak. Delete them all and you will have what you asked for. The next time you fire up LW the downloads.dat and downloads.bak will be be written again but without any previous searches.

Each time I am through searching and I do as above just to keep the old searches from popping up the next time LW starts up.

I don't know how to do it other than in WINDOWS.