: You must have a clean installation of PES 2021 on PC.
Because this is a complex mod, installation requires several specific steps to ensure the game doesn't crash or display incorrect data. Pes 2006 Downgrade Patch Fix
: The patch typically runs through Sider.exe . You must run Sider first, then launch the game through the custom PES2021.exe located in your Data folder. : You must have a clean installation of PES 2021 on PC
: If you encounter incorrect jersey numbers or shoes, users on Reddit suggest setting the CPU affinity (similar to vanilla PES 2021 fixes) or ensuring the DpFileList.bin is correctly placed in the "download" folder. Where to Find the Patch Pes 2006 Downgrade Patch Fix