1. Plug in your radio to the computer, choose Joystick mode if prompted from the radio.
2. Launch the game, go to Options -> Radio & Gamepad
3. Choose the correct joystick axis for controls of each input channel.
Use the axis display at the bottom to see whether you have chosen the right axis for the channel. If the bottom display stopped refreshing, try to switch the tabs back and forth (this'll be fixed in the next release)
4. For DJI remote controllers, please toggle the Is DJI remote controller option. Note you'll still need to reassign axes (will be optimized in the next release)