Other alternative (it's a bit of work you would need to do for each active torrent) but if the torrent contents is plain text then just use windows search to search in the files for the file name of one of the contents of the download e.g. "blah.avi"
alternatively can you not create a new torrent file from your client? (I'm also on a work laptop so can't really have a look
)
Not sure why you are so keen to seed anyway