Torrent

I know this is not the torrent help forum, but I don't know where else to ask so I thought I would see if anyone here knows. I am using tomato torrent, which seems to work pretty well. I am trying to download a single file, but I can't find this file by itself. It is only packaged with a bunch of other files that I don't need. Now on my PC, I remember I was able to check only the files that I want to download within a torrent. I can't seem to find that option in tomato. Does anyone have any advice? Thanks.