Steam will automatically download the necessary files to downgrade your game to version 1.35. For Legacy (Non-Steam) Users
To download Euro Truck Simulator 2 (ETS2) version 1.35 , the method depends on whether you own the game on Steam or have a legacy retail copy. For Steam Users (Recommended)
: Older versions of massive map mods (like older ProMods builds) require specific game versions. System Performance
If you own the game on Steam, you can easily roll back to version 1.35 using the "Betas" tab. This is often done to maintain compatibility with specific mods like ProMods. Steam Library Right-click on Euro Truck Simulator 2 and select Properties Navigate to the In the dropdown menu, find and select temporary_1_35 - 1.35.x for incompatible mods