How do you initiate a re-install of the aircraft firmware and the rc controller? I've been using my Phantom Advance for the last week and decided to pull out the Standard. When I started the rc and copter, it said that there was an update needed. Dummy here, I cannot remember if it was the copter or the rc. Took it out, re-calibrated the compass and imu, flys great. I was testing the RTH in of a failsafe issue. Now when I return to home whether with the DJI Go App or the left switch on the remote, it just wants to go into landing mode and not RTH. Help !!!!!!!!!!!!