Of course all your shared files will be in the Library. To select shared folders manually, go to Tools>Options>Sharing & select those folders you do wish to share such as the Shared folder, & remove those you don't wish to share. Of course press the Apply button after all changes.
To retrieve your lost files requires some discipline & a lot of concentration:
http://www.gnutellaforums.com/showth...threadid=34134 & look for PC Inspector File Recovery