Version 1.40 introduced a significant lighting engine overhaul. While visually impressive in many ways, the update drastically changed how the game looked, felt, and performed. Some players found the new lighting too dark, too washed out, or too heavy on their GPU performance. Version 1.39 represents the last era of the "old" lighting system—vibrant, stable, and familiar to long-time players.
If you own the game on Steam, you can often revert to older versions using the "Betas" tab in the game's properties, though Google Drive remains the best option for standalone archives or "clean" installs. ETS2 1.39 Update Release - SCS Software's blog Ets2 1.39 Download Google Drive
– No official "Ets2 1.39 Download Google Drive" exists from SCS Software. Any such link is third-party, unofficial, and potentially unsafe. A proper paper requires credible, stable sources, which this does not have. Version 1