MikeK61
Huhu Mike, protontricks finds your games just when the game is purchased direct with steam or when you add a non-steam game to steam.
When you bought the game via GOG you should use/try wine-ge (can also be loaded in heroic) instead of proton cause proton is normally just used in combination with steam purchased games. Sometimes proton also works (even better), but outside of steam, normally wine-ge which includes also proton stuff should be the way to go.
(Proton-GE can also be modified with in heroic launcher with winetricks, the same way I mentioned if you what to test proton)