Some players have save files from a decade ago that they cherish. While SCS Software does an incredible job maintaining save compatibility, sometimes the jump from version 1.1 to version 1.50 is too great. Players might need to install the legacy version just to view an old save file or take screenshots of their old virtual company.
SCS Software maintains a page for users who own the original disk or non-Steam versions. Euro Truck Simulator 2 V1 1.1 Download
SCS offers an Online Updater that can help patch a legacy installation, though it typically targets the latest version rather than a specific old one. 2. Trusted Third-Party Archives Some players have save files from a decade