Are you sure about that file extension? I'm not sure I've ever seen one. Are you sure it's not the original torrent you downloaded from a site? Otherwise attempts to open would not prompt LW to redownload it.
Go to LW's Library, find the file you downloaded, Select it, press Explore button or right-click & choose
Locate File on Disk depending on whether you are using LW 4 or 5. If using LW 5, then the last action will point you directly to the file in question.
http://www.gnutellaforums.com/gettin...disk-tool.html