EXTREME CAUTION! Displays have been bricked!
This is Axpert Max 1 (NOT Axpert Max II with the fixed colour display) firmware version 112.19 (displays as U2 12 19 on the front panel). The leading "1" seems to be very significant. I suspect that it means that the display uses a GigaData MCU chip as opposed to a ST Microsystems MCU, but this is not yet confirmed.
ONLY CONSIDER USING THIS FIRMWARE IF YOUR EXISTING FIRMWARE IS 112.xx.
As always, use at your own risk. As of mid November 2022, this should probably only be used to attempt to rescue a bricked display.
This firmware should be usable (with the above caveats) on all Max models (7.2, 8, or 11 kW), but NOT other models, unless existing firmware is 112.xx.
I don't know what features or bug fixes this firmware contains, sorry.