If you purchased ATS directly from the SCS Software website (non-Steam), you can download the 1.39 installer from their official patch archive. However, SCS primarily pushes patches via Steam now. For non-Steam users:
Although the Colorado DLC is paid, update 1.39 laid the groundwork for it, adding new road prefabs, rock formations, and vegetation unique to the Rocky Mountains. american truck simulator 139 download full
Finally, after hours of driving, you see the Chicago skyline on the horizon. You breathe a sigh of relief as you complete the delivery, earning a tidy sum of money and a reputation boost. If you purchased ATS directly from the SCS