Ah, ok, my bad. I didn't even know there were purchasing options. I bought this seperately, not as part of a bundle. While I would totally buy the Godot DLC seperately, if that was possible (but it appears it's not), it is not that important. Thanks for the fast reply!
I changed the settings and there is no more extra to get the Godot version, and now everyone can choose to download the version of his choice. Try to download it again ! :)