As it says in the title. I have tried doing it through Galaxy and manually. No dice. Any help?

Same problem. Preordered the game and GOG Galaxy shows me 'unknown version' v.1.1.1.0064 RELEASE V1. And i can't install Beard & Hair Pack + Prize Crew.

It worked for me buying it through gog galaxy (the dlc, for 0 dollars). Then patching the game to 1.1.1. Then installing the DLC via the button that previously said 'buy'.

This was after a very long update of Gog Galaxy its self.

I only updated from a 1.1 install though, as my previous 1.02 I had to delete due to Galaxy and GOG flaking out over where it was actually installed.