I realise this is a long thread but check this
http://www.gnutellaforums.com/downlo...elete-all.html .. one of those utilities has since become shareware.
However, if this issue repeats itself it's something that needs to be solved. My first guess is something to do with how Win 7 & Vista both behave. Example is
http://www.gnutellaforums.com/genera...tml#post289927 however that is in reference to the program itself. It might also apply to the downloads however, I don't know.