Installation: 
Copy the content of the folder "We Happy Few - Reshade" to the game's installation folder.

Deletion: 
Delete from [We Happy Few\GlimpseGame\Binaries\Win64] the folder "reshade-shaders" and the files "dxgi.dll", "dxgi.ini", "WE HAPPY FEW.ini", "dxgi.log". 

Using the reshade preset: 
The preset is enabled by default. 
To disable or enable the preset press the Scroll Lock key. 
In the case of We Happy Few, there is a problem that the preset is re-enabled automatically immediately after disabling it.

Download: 
http://www.mediafire.com/file/cheht4b0hym06s2/We_Happy_Few_-_Reshade.rar/file