There is no standalone "My Summer Car 2019" edition. The game is a single, continuously updated product on Steam developed by Amistech . However, Steam does allow you to roll back to older branches (beta versions). The "2019" experience refers to game versions from 15.12.2019 (the "Christmas update") or the mid-2019 Experimental builds.
Players no longer received full access to the blue van and truck right away. You had to wait for your uncle to lose his license, forcing creative early-game survival. My Summer Car 2019 Download