TheBlueBelt: Thank you for your help. I was convinced I had the base game, but that is on Steam so it turned out.
So I got things mixed up here, sorry for taking your time.
Keeping track of what I do own or not is a bit confusing sometimes.
adaliabooks: Haha, don't worry. It's easily done.
That's why I buy most of my stuff here... far easier that way and less work to keep track of.
I use IsThererAnyDeal.com's collection view for that, though my integration script for loading GOG libraries into it will be a little rickety until December, when I can work on bringing it up to spec.
(Currently, all of my coding time is focused on preparing to move my websites from shared hosting to a mix of GitHub Pages and a VPS ahead of a December 1st fee increase.)
Cavalary: Since GOG won't work at all in my really locked down FF, no way to test.
1.
firefox --no-remote --ProfileManager 2. Create Profile...
...or just install Firefox Developer Edition since that defaults to using a separate profile.