Hopefully there will be some way to escape this insidious problem besides replaying the entire episode. I exited the game while in "dog-costuming" mode (with the close-up of the dog costume trunk). Now when I load the game, I can neither right-click to escape, nor select costume pieces to continue with the game. Can't move forward; can't move back. And when I exit the game again, it helpfully saves again, exactly where I'm stuck at.