I believe you'll find that the PVR will not work, period, without a subscription to Bell. If you wanted to download, you should have done so while still subscribed.
One option would have been through the use of a Hauppauge HD-PVR as part of an HTPC.
The files are encrypted and cannot be simply "downloaded" to a computer for play. I also believe that with the firmware utilized by Bell Fibe, you need "authorization" every time you wish to play a recording, so, as mentioned in my paragraph 1 of this post, I think you'll find you can't even watch, much less "download". See also post 6 and other posts of this thread.