We just heard back from Steam and the GB DLC is no longer able to be purchased. We've addressed the issues and that they cannot be solved. The same content and remastered game is now available through the GB Standalone product. It really is exactly the same which is what caused so many issues. We promised we'd deliver it as a DLC and we promised that we'd deliver it as a standalone. We did, but we did not take into account how well Steam would handle what we were trying to do. Really, why should they? It was my crazy plan.
We will have the stand alone on sale again if you missed the wargamer sale. But the good news is that you should be able to get a refund for the DLC now. So please do as soon as you can.
Now that this is over we are working on moving forward and fixing any remastered issues.
NOTE that both games use the same engine. They will both get the updates. All future plans to expand features will affect both games.
The really cool thing is that you can also download the original 'classic' version if you want.
Thank you for your patience,
(I always laugh at that as I am not patient and when people say that you really did not have much of a choice)