When I hold the icon on the upper right and I enter the firmware screen I can't do anything because there's no list of firmware versions. Instead, it shows "NONE" in the "Please select firmware version" screen. It also displays "Current Version: Unknown", and a red text "Get Firmware Version Failed". How do I get around this? As a sidenote, I have a RC Signal lost problem, I know the fix is that I should downgrade the remote control firmware. Please help as my drone is useless right now without getting around this!