I'm sorry for the worry I have created. The reality is even more fun.
The games you are player are most likely still at 2.12.. The Version only changes after a restart, which is why i didn't feel an advance warning was necessary. As the Version the games were started on is available nowhere there is no good way to know which Version you should use. Isn't that fun?
Actually, in the old days, IllWinter made the patches so that playing with different Versions were impossible. I liked that better
To solve the problem now, I could kill every single game, but in such a way that all games will appear to still be running. Then the game owners can restart when they feel they are ready. In this way, the game slots cannot be stolen.
Is that a better way to do the upgrades?