You can refer to this Tutorial Video for Installation Process: https://youtu.be/rhLkx9JPvVg

Must Note:
Open "ReShade.ini" then under [GENERAL], 
IntermediateCachePath=C:\Users\UserName\AppData\Local\Temp\ReShade
change "UserName" to your to PC's Username.

Example, 
IntermediateCachePath=C:\Users\alez\AppData\Local\Temp\ReShade
