You now have a fully functional, online, safe version of ETS2 1.40 that takes up roughly 3.5 GB of space. This is safer than any repack online.
Purchase ETS2 Base Game on Steam (often on sale for $5). Step 2: Go to Steam Library > Right-click ETS2 > Properties > Betas. Step 3: From the dropdown menu, select "temporary_1.40 - 1.40.x for outdated mods." Step 4: Download (approx 6 GB). Step 5: Download CompactGUI from GitHub. Step 6: Run CompactGUI as Admin, select your ETS2 folder, choose "LZX" (maximum compression), and hit "Compress." Euro Truck Simulator 2 1.40 Download Highly Compressed