If you rely on mods that have not been updated to the very latest version (1.44/1.45+) but work on 1.43, you need to switch to a specific branch to stay on version 1.43. SCS Software keeps older versions available for a limited time for this purpose.
: By default, Steam will download the update automatically. Euro Truck Simulator 2 Update 1.43 Download
Update 1.43 was much more than a simple patch; it brought transformative changes to both the map and the core mechanics of the game. If you rely on mods that have not
If you are not opted into any beta programs, Steam should automatically detect and download the update. Update 1
: If you were participating in the 1.43 Open Beta, you must opt out to receive the stable release. Go to Steam Library > Right-click ETS2 > Properties > Betas > Select "None" .