I bought a brand new CGO-ET camera for my drone and it was working until I updated the firmware. Immediately after connecting the camera to the drone, I went to check for updates on the UpdatePilot app. An update started downloading for the camera and asked me to insert the SD card in the camera to continue. I did so, and after a bit of time, it asked me to restart the drone and wait until a green LED flashes and if it didn't, that I should repeat the process. I waited a long time and repeated the process a few times, however the green LED never flashed. Now when I turn the drone on, the camera WIFI doesn't show up for 5 minutes and sometimes longer and when it does connect with the station, there is only feed from the thermal camera and not the HD camera. How can I proceed to revert back to the old firmware? I tried deleting the files from the camera's memory card but that didn't help.