Please try below steps to flash the firmware via computer:
It can be done with the camera turned off.
(Please try not to insert the sd card and the battery in the camera while reflashing.)
1.Install this: https://runcam.zendesk.com/attachments/token/vDErTSW4RgCokgRQ3DNHTxASA/?name=icatch_v3000_For_V37_V50_V35_V33_K33.7z to your computer.
2. Hold the Zoom- (down) button and the Menu button at the same time, connect it to computer via USB cable. If the camera gets recognized successfully, you will see two devices in device manager as shown below, and then you could release the buttons.
3. After unzipping, open the attachment file download.zip and find FRM and click it and then set as we showed in below screenshot and click ISP. The flashing starts. A few minutes later, it will show ISP finished and flashing is done.