Removing Battleye for Reverted Games
At least for Steam Versions, for example 2372 (Tuners), here are the steps:
1. Let the Game Update as usual. This will be to version 3323.
2. Once updated you can delete the BattlEye folder and the GTA5_BE.exe. They are in the root/installation folder for your game.
3. Replace GTA5.exe with your reverted version of GTA5.exe. No other files necessary.
4. Update SH5 although it isn't necessary - so optional and not done by our team
5. From Steam, Library, Select Grand Theft Auto V without launching
6. Right click on the game name and select properties
7. Enter launch argument -nobattleye as in screenshot below