I probably missed enabling something somewhere but I don't seem to have an extras menu and thus can't enable any mods...

I redownloaded the latest patch and installed it over the latest GOG version of the game just to be sure but that didn't seem to make any difference. Anyone have any ideas?

I haven't installed the game at the moment, but have you looked in the optionsmenu?
Also this game is prone to problems when installing it in %:\Program Files%, so if you have install it somewhere else.

btw. It isn't recommended to install retailversion patches over GOG games as that might enable DRM.

Yeah, I'm not normally in the business of patching over GOG games because they provide the latest version already, but I thought that maybe something went wrong when installing it from the base package. I'd also not installed it in program filas as I always put everything in a 'games' folder.

I reinstalled the whole game and miraculously the extras menu has appeared and the mods work :)