There are several alternatives before taking that step of going backwards.
Try the factory reset method of other SuperPad's....press and hold the menu button and the big round back button and then press the power button. If that doesn't place the tablet in recovery mode then ...
Ask the supplier to provide a current update and/or ...
Have another SuperPad user dump their "resv" or recovery partition for investigation to determine whether a copy of the backup system.img (zSYS.img) exists.
I tried the factory reset step (menu+round button), it does not affect my tablet at power on.