Installation:
1. Copy paste in ACS.exe folder.
2. Press Home key while in game and select Assassins Creed Syndicate Ultimate 2024 Reshade Preset from the home tab of the reshade by using the blue arrow keys by clicking with left mouse button. The game will freeze while loading the effects for few seconds. After effects are enabled, press Home key again to exit.
3. Done.

Other info:
Effect toggle - Scroll Lock key
Reshade settings - Home key

Cheers and Enjoy!!