I have been using the free version of Paint.net for several years and have donated $10 towards it. But I was invited to buy a copy so that I could get automatic updates, which I did.

There was no message saying what to do to get the paid-for copy so I uninstalled my free copy. I then searched for how to install the paid-for copy and could not find any way. All I could find was (a) a download of the free copy, or (b) Buy a copy.

How can I download the correct paid-for version?