I posted previously that I couldn't get dji fly to work on my s21. Dji doesn't s2to have fixed this issue yet so I'm looking at Litchi app so I can fly. My question is can you update air2s firmware without a connection between Fly and the controller. I haven't updated the aircraft firmware for at least a year so I'm concerned that litchi might not work because of the outdated firmware. I think I've also read that you have to update firmware with dji app, not litchi app. Again, can I somehow update firmware without dji fly being connected to the controller. Thank you for your help.