Check that you are not running the game through a launcher that automatically "repairs" or reverts files to the official Steam branch. 3. Compatibility & Mods

Ensure you didn't accidentally extract the files into a subfolder (e.g., Foundation/Foundation.v1.9.1.3.../ ).

Once installed, check the bottom-right corner of the main menu. It should reflect the version . If it still shows an older version:

: This is often caused by an incompatible resolution setting in the user_settings.config file found in %AppData%\..\LocalLow\Polymorph Games\Foundation\ .