Backed via the Kickstarter. Used the GOG keys in order. Installed the game via GOG galaxy. Downloaded the the pre-order bonuses. When it was clear that the pre-order & kickstarter awards weren't in the game - I checked at Oleg's, I attempted to manually install them. I get the following error message:
"This version of the base game is not supported. Please update your game version with the latest patch." I am thinking the language patch hotfix is preventing it.

Kind of frustrated.

Matt Harris

I confirm. The same goes for extra portraits DLC (that was mentioned in another thread). The base game version is 23987, while the DLCs version is 23963. I think that the DLC files have to be patched as well.
update: It is fixed now. All files have the same version - 24012.

The latest patch fixed the problem for me anyway.

still haven't gotten my preorder items,

Hey, I now have the hotfixed mac version and I have no clue how to get the preorder bonuses? Any ideas?

You mean in game?

So, anyone on Linux got their bonus? The download page only shows .exe files, which I don't think is terribly helpful...