Thank you Minimage, I hope that is all that's needed. I had a GOG support rep refresh my library, probably the same thing your link does, and that worked. I hope everyone else with this issue is able to resolve it with your link.
I have seen this mentioned elsewhere so I know I am not the only one but I wanted to get it on the tech support forum.
The Fig Backer - Premium Digital Edition install button is grayed out in GOG Galaxy and the GOG website has no download files and simply says to try Galaxy.
I don't know if this is anything that can be fixed on this side but maybe some pressure from Obsidian can get GOG in gear.