Uninstallation - TheRazerMD/OptiScaler GitHub Wiki

Automatic

• Should be enough to run Remove OptiScaler.bat

Manual

• Run DisableSignatureOverride.reg file if previously enabled
• Delete EnableSignatureOverride.reg, DisableSignatureOverride.reg, OptiScaler.dll (for old versions, it's nvngx.dll), OptiScaler.ini files (if you used Fakenvapi and/or Nukem mod, then also delete fakenvapi.ini, nvapi64.dll and dlssg_to_fsr3 files)
• If there was a libxess.dll file and you have backed it up, delete the new file and restore the backed up file. If you overwrote/replaced the old file, DO NOT delete libxess.dll file. If there was no libxess.dll before, it's safe to delete. Same goes for FSR files (amd_fidelityfx).