Calibration

Calibration

I have a question.. the guy that sold us CMM Manager and did the last calibration on our CMM has gone out of business. The guy we used in the past with OpenDmis is coming to do the calibration but doesn't know CMM manager software and is telling me that he has to charge me almost $600.00 more to calibrate because of this and there being no "Map"? Maybe a dumb question but couldn't the calibration be done with the OpenDmis software still on the computer? Or is the calibration somehow tied into the specific software. Sorry if this a dumb question but I just don't know. Thanks in advance for any input.