Great news, been waiting for this (though I forgot until just today when I saw the announcement and freaked out). : )

But, how exactly does it work (on GOG) ?

I bought the DLC, downloaded the patch (bout 70 MB), installed, started the game.

But its still beeping and I can see no *beeping* difference. Also no options to activate / deactivate the DLC?

Am I missing something?