You cannot open or "extract" part 09 by itself. It is simply a container for a middle section of the game data.
For the most stable and secure experience—including access to the latest sorcery features and official multiplayer servers—it is best to download the game through official platforms like Steam, Epic Games Store, or Xbox Game Pass , where the game is frequently updated and verified.
If even one part (like part 09) is corrupted or missing, the entire installation will fail.
The date in the filename (13.09.2022) is significant because it aligns with the massive update (Update 3.0). This was one of the most transformative patches in the game's history, introducing:
Downloading game builds via multi-part archives from third-party sites carries several risks: