What is the difference between 1PW4 and 1PW5 ? And do I get family license again when I purchase ?

@passfrank: Great question! Since this is about licensing in general, though, I've moved this thread to the Lounge so it isn't stuck in the old 1Password 3 category. ;)

1Password no longer has 'family' licenses; rather, a 1Password 5 for Mac license (which will also work in 1Password 4) entitles you and up to 5 other family members in the same household to use 1Password on all of your Macs. It's really that simple.

I hope this helps. Let me know if you have any other questions! :)