Nothing has changed. It is the same as it has always been.

Open Address Book select the address book you want to backup (not the 'All Address Books' as that is just a type of virtual search) Click on 'Export' - (If using 91* - it is under 'Tools'. If using 102 then it visible on the Address Book toolbar) Choose where to save file, either use filename as it is or edit it. then choose the filetype from the drop down list eg: LDIF or .csv click on 'Save'

THANK YOU  ! :-))) PS IN V102 : But know that the Location of the Export one wants HAS 'changed', in that the Export you pointed out is NOT under TOOLS as it used to be! That Export creates a ZIP of the Profile! The Export I want is under the 3 DOTS next to the Particular Address Book on the Left!

In 102 lots of annoying things happened and this was one! Thanks to Matt Miller I was able to do what was obvious before the downgrade.