So, the game utterly broke down on me now. I'm playing on the Mac.
Game wouldn't carry over my data to Episode 4, so I tried to rewind to the very end of Episode 3 to fix it. Instead, it took me all the way back to the beginning and deleted my progress.
And then after that, every time I try to access an episode past Episode 1, it asks me if I want to rewind, even though I have no saved progress there anymore. Then whether I say yes or no, the game locks up completely and I have to shut down my computer. Deleting my saves did nothing, and every attempt to start an episode is completely broken; it either freezes, or drops me right into a random scene from the episode.
Now I can't even access Episode 4, it just says "Coming Soon."
Re-installing the game just broke it even worse and now I have random deleted save files spawning back into existence.
So, my game's completely broken and almost completely unplayable, my saves are gone (except when they're not, and they're still broken) and I can't do anything at all anymore. I uninstalled it again because if it's not going to work at all, I won't bother keeping it installed.
I won't make it a secret, I'm a bit utterly enraged by this. I tolerated the constant graphical glitches and the glitchy controls and the stuttering. But now all my hours of gameplay has vanished and I can't even try again.