I have the same problem running the game on a Mac with Steam.
I happended 6 or 7 times in the Motel in Episode 1, then 3 or 4 of times on different moments during Episode 2, and now I'm stuck at episode 3. It freezes when I enter the train station.
It always happends when a cinematic is starting or about to start. I play with all the graphic settings on low and ussually after restarting one or two times it works, but not this time.
¿Can you offer any help? I'm really liking this game, and I really want to see how it ends