If you only use QuantV and no other mods, you can simply delete the entire folder to reset your game to a vanilla state. 4. Remove ReShade/ENB Residue
Always back up your game files before deleting items in the mods folder, as this may affect other installed modifications.
Quantv Portable generally does not write to the registry, but if you ever clicked "Register file associations" (e.g., associate .m3u or .mp4 files with Quantv), there will be leftover registry keys.