If you experience an error after FW update and you want to revert back to the previous state do the following.
1. Switch off the printer
2. Press and hold the Pr3Dator erase button and switch on the printer. Release the button
3. Wait the printer boot up and display “Mainboard communication error” (no FW on the Pr3Dator)
4. Download an old FW form the CraftBot website and put it on a pendrive.
5. On the printer do a FW update (downgrade) from the pendrive