I have been asked to help an old family friend with migrating her contacts from an old version of Now Contact to Address Book. She has a PowerBook G4 running OS X Leopard 10.5.8 & Now Contact version 4.2.6

I had never seen Now Contact before & cannot find any obvious Export feature but I may well be missing something as I have no documentation. Please could someone point me in the right direction to accomplish my task?