In late April 2020, I pushed an update to the site that changed some of the functionality of the cities games in order to make them manageable to operate and improve. An unfortunate consequence of this update was that you could no longer add cities to existing sessions.
You can use this page to make your old games editable again, provided that you still have the link. Please note that once you restore a session on a computer, you won't be able to add cities to it from any other computer
Paste your link into the text box below. Make sure that