I'm still using the Mio and have sold the VU+. The remote pendant from Stab is a dual-purpose device. It allows one to setup the motor without using the STB...ie move the motor E or W and save positions, and an added feature it allows one to reset the memory back to factory settings. Mine was corrupted by using the goto command in various E2 images. I did not know it at the time, but using that command can corrupt the memory in the motor. They have two versions the P1 and P2. Only problem is no one here in the US stocks them and you have to order from overseas dealers. They are also not cheap. Another way of resetting is to use a USB satellite receiver. By using one of these boxes and a special program, you can send the reset string to your motor. Those are not really cheap that I have found as well.
I found all this out from Brian as his company used to be the NA repair depot for Stab back in the day -