Copy the content of the folder "Dynasty Warriors 9 - Reshade" to the game main directory.
It is recommended to disable the depth of field effect in the game to get clearer image.
Delete the folder "reshade-shaders" and the files "dxgi.dll", "dxgi.ini", "DW9.ini", "dxgi.log".
Using the reshade preset:
The preset is enabled by default. To disable or enable the preset press the Scroll Lock key.