If you are having trouble with this specific file, I can help further if you tell me: Is the file or giving an error ? Are you missing other parts of the download?

Right-click on part01 and select "Extract Here." WinRAR will automatically pull data from part 15 and all other segments.

Run the setup.exe found in the extracted folder. Turn off your antivirus temporarily, as repacks are often flagged as "false positives."

You cannot open part 15 alone. You must have every part (part1, part2, etc.) in the same folder to extract the game.