This is a "new" DLC. Remember: This DLC does not change anything to the game at all. The game stays free if you want it free, but if you want to pay for the game, im would been very happy! The paid version should stays in your library, which is why im added this DLC.
So im will not take any steam key requests due this DLC and in fact, you can now play this game for free.
Thanks to all, that have paid for this game! Thanks for that!