To stop upgrades of PRO3 to PRO6, or PRO6 to PRO9, etc, the surfaces are licensed.  If an MC or scan processor is replaced or has to be re-programmed, then the surface will need to be re-licensed.  This requires running the licensing software (LCAT).  You will need to submit a case with the Midas Support Team for the relevant software and instructions.  When you run the licensing tool, you will need to supply the Midas representative with a code and they will reply with the license code, so doing this at a amicable time would be helpful.  The surface cannot be switched off as the code will change again on repower.