Run in Windows 7 compatibility mode + as Administrator. Also, disable any screen recording software (OBS, Discord overlay).
RobTop Games has stated that they will not legally block users from playing older versions, but neither do they support them. As of 2026, the modding community has created launchers (like ) that allow you to seamlessly switch between 1.9, 2.0, 2.1, and 2.2 with a single click.
Most private servers run independently of your official Steam installation, meaning they won't interfere with your main save data. 2. Using Steam Depots (Advanced)