It's simple enough.
Just head to the release section or click HERE, download the latest version available.
Extract the archive and then read the "readme.txt" file.
Click the images to enlarge.
ReShade developer for developing ReShade.
SweetFX developer for creating SweetFX shaders collection/set/pack.
FRAMED. Screenshot Community for their amazing tutorial on how to inject ReShade into UWP games.