(Essential to remove if you had the ENB version installed) Step 3: Delete ENB and ReShade Components
Since QuantV Portable is designed as a "no-install" package (it runs from a dedicated folder), it does not appear in your Windows "Add or Remove Programs" list. Simply deleting the folder is often not enough, as it injects files into your main GTA V directory and creates cache files elsewhere.
Those are dead links. Right-click them > Properties to see their target path. If the target is missing, simply delete the shortcut from your Desktop or Start Menu.
QuantV replaces or adds custom texture and shader files. Delete or restore these: