Huh, I bought this game, the 1.1 version from Nukaku several months back, I wonder what the difference is between that and the 2.1 version here.
I just stumbled into this thread and for a moment there, I thought I missed something too. I bought the game from Nutaku way back when (November 10, 2016) and played through it. The Nutaku file is named 1.1 and that's what they call it on their store page, but if you click on the credits or look at the folder it creates when installing (whateveryourfilepath\ouroboros_Windows_1_1\Ouroboros 2.0), it's called Ouroboros 2.0. So not really a screw-up per-say, just bad file naming. I think... I'm mostly sure we (Candyman and any other Nutaku purchasers) didn't miss out on SierraLee goodness.I would check your nutaku acount again and see if it is still V1 there. Might have been a screwup regarding versions.