Hello! Please don't necro old threads c: You can post a question in the Game Help thread.
As for your question, you can install them by exporting the files and then putting them into the main folder!
HOW TO INSTALL:
1. Download the 7z file from the link above.
2. Extract the 7z into a folder.
3. Inside the folder, there should be three things; a folder called 'ReShade,' a file called ReShade.fx, and a DLL called opengl32.dll. Drag these files into the root of your Feral-Heart directory.
4. Launch the game in OpenGL. To do this, just launch the game, go to options, video tab. Go to 'Rendering Subsystem' and change it to OpenGL, then restart.
5. Bam! It should work.
While that may not be for the same shaders, it should be quite similar. If not, make sure to start a new thread in the game help! I'll be locking this now