I actually sell these. You can manually lower the door to the height that works comfortably, then hold the automatic door button down for about 3 seconds. That should program the door to a new maximum height.

The article was disappointingly lacking, but would radiation still not penetrate Mars crust to a certain degree? Having the terraforming capability and magnetic shield in place within a 4 year period per individual seems to be the constraints implied.

Sadness. RIP lovely one. Best hope for the future of the two kitties.