Once edited, the file must be placed back into the livecpk directory (for Sider users) or repacked into a .cpk file for the game to recognize the changes. Important Distinction: Player.bin vs. EDIT00000000
Remember the golden rule: Always exit PES 2021 completely before making changes. And when in doubt, the ProgramData\KONAMI folder is your home base on PC. Player.bin Pes 2021 Location