Rated 4 out of 5 stars
It isn't obvious that this will only extract NEW email addresses, that aren't already in any Address Book.
It would be great to have an option to extract NEW or ALL email addresses!
I was able to work around this by copying off all the Address Book files (a-book*.mab) in the Profiles folder. Then, I ran the utility to extract what I needed and got all addresses. I then saved that new Address Book, restored the other saved ones, and then added back this new Address Book. A lot of steps to get around a problem that could be simply coded around.