Welcome and thanks to the new Ulm player.
No problem with a rollback. Anybody who already looked at the turn and saved it should delete the contents of the game folder, and let a new .2h be built from scratch.
Also, my vote would be for normal in-game communication in the thread. My communication skills are bad enough that I would prefer to address my games when I'm thinking about them, and reserve email for RL, or urgent communications. If nobody answers me in the thread, I will stick to the original premise.