I’ve updated the elevator controller to 1.5.1, RentTrack doors to 1.0.1, and RentTrack to 1.2.0. Update your products via their updaters to get new packages from the update server.
The Quality Assurance team is doing a great job of finding and reporting bugs to me, so this should result in some more stable products.
Also, I’ve found a slight problem with the elevators and the monitoring script. Seems as though if a region goes offline while a car is in transit, it will be stuck when the region comes back up. At the moment I don’t have any way around this, so you will still need to occasionally reset your car when your region goes down.