SCS Software is very modder-friendly and keeps old major builds available in Steam. Once you own the game, you can legally roll your game back to exactly Version 1.40. Here is how:
To download and install Euro Truck Simulator 2 (ETS2) Version 1.40 Download Euro Truck Simulator 2 Version 1.40
Since the official method is the safest, here is the definitive guide to reverting your game to version 1.40 using Steam. SCS Software is very modder-friendly and keeps old