There's some sort of legal doctrine to the effect that you can't be punished for taking an action that someone led you to believe was authorized. This would pro

There's some sort of legal doctrine to the effect that you can't be punished for taking an action that someone led you to believe was authorized. This would protect you in cases where you use the licensed software when the license was still in effect. I suppose the better question is whether someone can rescind their license for their work and prevent future legal use of that software. I'd like to think that's not possible either, but I have no clue to be honest.