3.0.6 Adom @ Steam page requires SHIFT + [Letter]
I think there might have been an accidental change? Normally in previous versions, it'll ask you to press a letter a-c to continue to the main menu. Now, it requires the capital letter A-C instead. Just as a heads up, for people who have been playing for a while, this makes you think the game is frozen. I only discovered by accident it needed the capital version when my CAPs lock was on by accident. Without that happy accident, I was "locked" out of adom because you can't progress.