Disclaimer: This article is for educational and archival purposes only. Piracy harms developers. If you enjoy ETS2, support SCS Software by purchasing the game and its DLCs on Steam.
If you already own the game on Steam, you can specifically access version 1.39 using the "Betas" feature: Ets2 1.39 Download Google Drive -BEST
Most Google Drive downloads come as a .zip or .rar file. Use WinRAR or 7-Zip to extract the folder to your desired location. Disclaimer: This article is for educational and archival
Why those links look tempting