Update FITS Header with Airmass in ASTAP

Does anyone have experience batch updating FITS headers with Airmass in ASTAP?  My FITS header (from ASIAir) does not include Airmass or CENTALT.  I can batch calculate those values in ASTAP and I can see the results in the Photometry tab.  But I can't figure out how to get those calculated results into the FITS header other than manually adding them to each file.  I know how to batch update the FITS header in ASTAP, but that adds a static value.  I'm trying to have the program update the header with the Airmass result that it calculates for each file.

Otherwise I am having no problems uploading my ASTAP files into VPHOT.

Thanks in advance!