"I upgraded to version 2.0.37, with the same parameters as in version 2.0.35 (with which flew very well), but it was impossible to fly my quad (apparently a stable flight begins, but after about 2 seconds starts oscillate incrementally to turn around…"
I have APM Mission Planner 1.0.28, and Arducopter 2.0.35. The firmware load ok for my quad, but at Configuration window, the PID values of Acro mode remain "loading". Why?