Look for reputable community forums or archive sites that host older builds. Check Requirements:
For existing owners, the 1.45 update is part of the standard game support. Simply launch Steam, and it will handle the download for you. Euro Truck Simulator 2 1.45 Free Download
NVIDIA GeForce GTX 660 / AMD Radeon RX 460 / Intel HD 630 (2GB VRAM) 25 GB available space Key Improvements in Update 1.45 Euro Truck Simulator 2 system requirements - Can You RUN It Look for reputable community forums or archive sites
If you're looking for Euro Truck Simulator 2 (ETS2) version 1.45 Euro Truck Simulator 2 1.45 Free Download