Getting started with ReShade 4.9.1 is easy. Here's a step-by-step guide:
Only if you need compatibility with a specific old preset, game mod, or are avoiding a bug introduced in later versions. reshade 4.9.1 github
: It is frequently cited as the last "rock-solid" version before significant overhauls to the rendering engine. Getting started with ReShade 4
https://github.com/crosire/reshade