By the by. Here are a couple of things that I don't believe have been covered here yet.
If the file download gets interrupted, the Bittorrent link will restart the download where you left off. You have to point the file to the same place where you stored the file previously.
If you get an "Unable to connect to tracker" message, simply leave the client open. Do not terminate the file. Eventually, you will connect to a tracker.
Here's the biggie. If you finish downloading the file and leave the client open, others will be able to download from you as a peer. Once you have the entire file, you become what is known in the parlance as a "seed". If you have to shut down for some reason, but you want to continue to be a seed, simply re-link to the link to the file and when Bittorrent finds the file is complete, it will simply hold the client open allowing others to download from you