Mazda does not have any version history for the gracenote updates, or give us any idea if it's updated or not.
But you can download it here: http://www.mazdahandsfree.com/download.php?file=mazda/na/update.package
put the file on a flash drive (fat32 formatted).
plug it into the usb slot in the arm rest and turn on car, go to phone, then settings/gracenote or something and do the update.