A new software version is being rolled out into AirwaySim games today. During this time the games will be paused one-by-one. You can find details of the progress from the forums and from our Discord. The update itself is a major technical update to the backend structures related to routes, schedules and aircraft. The whole structure and large parts of the code on flights/routes have been changed and updated to better suit how the game has developed over years, and what plans there are for the future. You can read more details from the game Changelog. Update 20-Jan-23 / 18.15z: All running games have been now upgraded to new v.1.4.