Even though the editing software is gone, you still need to get your footage onto your PC. The simplest way to manage your files on Windows 10 without the app is via the method (manual transfer) or the GoPro Webcam Utility .
He imported the messy heap of clips—some vertical, some horizontal, some overexposed. In his old software, that meant hours of manual leveling. In Quik, he clicked gopro quik for windows 10 download