Competition v12 need firmware update

  • Hello i have bought a used plane and it has the Powerbox Competition and i see it has v12 firmware. I will install my Jeti rx so it would be nice to have jeti telemetry. Is it possible to update from v12 to last v15 with USB adapter? I'm asking this because i see bootloader integrated as a note on v13 update.

    Also i see my powerbox is missing door sequencer and on servo matching i don't have reverse function, in fact the previous owner used 2 separate rx channels for elevators but i want to use only one and match them with powerbox unit.

    Let me know thanks