Run ModAssistant and Make sure BSIPA is checked in the “Mods” tab.
Click Install or Update button.
Install mod on ModAssistant
Download BeatSaber_bhapticsFunctional.zip manually from this link and extract it.
Download mod file
Drag and drop folders to your Beat Saber game directory. (for most cases, C:\\Program Files (x86)\\Steam\\steamapps\\common\\Beat Saber unless you’ve changed the directory)
Copy folders to Beat Saber directory
Done! Run bHaptics Player, and play the game on Steam as usual! You can check mod connection at bHaptics Player when the game starts.
bHaptics Player