Using magnet bittorrents, all that is needed is to publish the magnet hash of the current version. And of course that someone somewhere is seeding the file with this hash. No trackers needed. While the swarm is new download will be slow, but it will soon pick up speed.
I just downloaded calibre-64bit-1.46.0.msi and added it as a new file to my Transmission bittorrent program.
The hash is: 1aa79875d03775afd55875cd7ab195699e30eaaf
And the link is
magnet:?xt=urn:btih:1aa79875d03775afd55875cd7ab195 699e30eaaf&dn=calibre-64bit-1.46.0.msi
You should be able to add this link or just the hash to a magnet aware bittorrent client, and start downloading from my client. I seed with very low bandwidth, and I won't seed more than a few days or so, but it should be proof of concept. Feel free to test and see if you can leach it from me. It can take quite a while before it starts, but it should work. I think...
If many start to leach and share at the same time, everything will go much faster. And many can download the same file and also start seeding it. It will always have the same hash, as long as it is not modified or renamed.
Just an experiment...