The update process depends on which version of the game you own: For Steam Users (Recommended)

map expansion received the island of Corsica as a free addition. It is accessible via ferry from Marseille, France, or Sassari, Sardinia. Detours System

For users specifically attempting to replicate or force this update in a modern environment:

While the DLC itself launched slightly after 1.36, the update prepared the game engine for the massive map expansion (Romania, Bulgaria, Turkey). Without 1.36, you cannot even install or run the latest map DLCs.

: The game transitioned fully to DirectX 11, with DirectX 9 support being removed entirely to improve performance and visuals.