You don't convert it. Use a bit torrent program. Like LimeWire, Azureus or bittorrent. These are three of them. There are plenty out there but in my opinion they are the best. Then download the torrent if it isn't already. Open it. It will open your bit torrent program. If it isn't already. And it will start to download. When it's finished it will give you the files you got from the torrent.