Wanting to roll back to ArduPlane firmware 3.3 to use HIL_MODE=1, selecting HIL SIMULATION Load Custom Firmware AR2.49 AP 3.3 AC 3.2.1 or AR2.50 AP 3.3 AC 3.2.1 loads AP with version 3.2.3 in both instances. Firmware 3.3 cannot be installed, only 3.2.3