Copy all files from that folder and paste them into the main game folder where the executable is located, overwriting existing files.
Before starting, ensure your system meets the minimum requirements and your environment is prepared to avoid installation errors.
Temporarily disable your antivirus or Windows Defender. Repack installers and multiplayer fixes are often flagged as "false positives" because they modify game files.
You will need approximately 20 GB of available space for the installed game.