I need a hands-on person who "knows their stuff." My P3 Advanced, which I had for a long time and flown very successfully, has suffered the forced upgrade of DJI Go 3.1.8 and therefore is messed up. Litchi still functions properly. Need a knowledgeable person here in SC to get things right again. NOT sending back to China or to some yahoo to guess/experiment solutions. By the way, Hardware in perfect shape and have the new HDMI module installed and successful for some time.