I've bee looking on the net to find out how to uninstall Reshade if needed. Actually there are two ways : games bought through Steam and games bought on the net.
The way I've found out is to uninstall manually following folder and files from the root of the game bought and installed in Programmes or Programmes files :
eshade-shaders : delete with all the files inside
"your player's name" Reshade profile.ini
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