Greetings Pilots.! .. Any of you know how to downgrade the DJI GO4 App on IOS. ?… I found a video on YouTube where they explain how to do it but it is a video from 3 years ago and uses a program called Charly Server, iTunes with an old version and a list with the numberings associated with each DJI GO4 Firmware… I tried to do it described in the video but I could not achieve it, since the versions used are very old ... Do any of you know how to do it with updated programs? Thanks .!