AmethystViper: I have no clue, but around the time this version was released, the Windows version from the Humble Store was gone and I can't even re-download it either despite actually paying for it (all that are left are Mac, Linux and Android version, which I can't use since I'm on Windows). Though to be be fair, it wasn't much better than the GOG version since it has more-or-less the same crappy problems the GOG version has.
This sucks. I get mad, even when they remove a tiny part from something you paid for (like GTA tracks), not if they completely lock you out for good, from the entire thing you legitimately purchased... I feel you, Ame.
I bought Ultra here when it was dirty cheap. And from what i see, i will refrain from getting 2.
Something tells me the issue i encountered, isn't going to be fixed anytime soon... Happy gaming in other titles and good luck in your other projects.