Alternatively, maybe they want to download the game from an alternative source. But promoting piracy is wrong, so I should only recommend official sites. Let me make sure the steps are clear: visit the official website, check the download page, maybe there's an option for the latest version. Also, including a direct link would be helpful, but I should verify if they have a direct download link or just the store page.
: If you own the game on Steam, the client automatically updates to the latest version. To "downgrade" to a specific older version like 1.45 for mod compatibility, right-click the game in your Steam Library Properties > Betas , and choose the 1.45 branch from the dropdown menu. Official ETS2 Website download euro truck simulator 2 version 145 link
Right-click on and select Properties0;ee;0;423; . Click on the Betas tab. Alternatively, maybe they want to download the game