We're waiting for the exact date of release, but we're expecting a game update in the next week - 10 days that addresses several issues with the game, part of which is related to the Scenario Planner. This update will improve the overall performance and stability of the game but will wipe any scenarios you have already created. We are aware that this is far from a desirable situation, and every effort has been made to prevent this happening but it is, unfortunately, unavoidable. PC users may be able to copy existing scenarios from their save locations to restore after the update. Sorry for the inconvenience. Full patch notes will be available alongside the update.