Sorry for not responding sooner. All you need is a torrent app like Torrex Pro or Vuze. I use both but prefer the former. Download the app, then (once you are a member of the site) you download the torrent link. App should automatically open and pick up the link. It will ask you where you want to save it to and the download process starts. Just remember that you are seeding/sharing as well, so leave the app open after you have downloaded as this will help others too.
Thanks!