With the lighting updates in 1.45, SCS has optimized the engine. Generally, if you could run 1.44, you can run 1.45. However, if you notice stuttering, try the following:
(Note: This update is free for all owners of the base game. Always download updates through official platforms like Steam to ensure file safety.)
SCS Software's blog: Euro Truck Simulator 2: 1.45 Update Release
