How to get Protune back on GoPro Hero 5 (Session), 6/7/8 cameras.
This video shows how to enable Protune on GoPro Hero 5/6/7, GoPro Fusion/Max and GoPro Session 5 cameras.
For GoPro Hero 5 and newer models:
Camera Tools app: http://www.toolsforgopro.com/cameratools
For GoPro Hero 4 models
Camera Suite app: http://www.camerasuite.org