just drag the files to C:\your installation folder\MotoGP 20\motogp20\Binaries\Win64
Or go to reshade.me and download the latest version of reshade install and then grab the MGP_1 file (this is my preset) and drop where reshade is installed (C:\your installation folder\MotoGP 20\motogp20\Binaries\Win64)
Above.
Forgot to say that if you install Reshade copy this folder from the .rar "reshade-shaders" and paste/orerwrite it.
in there are the shader needed.
Or go to reshade.me and download the latest version of reshade install and then grab the MGP_1 file (this is my preset) and drop where reshade is installed (C:\your installation folder\MotoGP 20\motogp20\Binaries\Win64)