Can I upgrade from this version to the latest? Thank you
Do mean for this to be in the Mac forum? I once had an iOS version called 1Password Pro, but not a Mac one.
The upgrade from 1Password 3 to 1Password 4 was a paid upgrade, both for Mac and iOS users, so it will not show up automatically as an update for you.
Please note that 1Password 5 for Mac requires OS X 10.10 (Yosemite) and 1Password 4 for Mac requires OS X 10.9 Mavericks. Since we released 1Password 5 as an update to 1Password 4, we are unable to offer 1Password 4 for iOS, but if you're on iOS 8 you can upgrade directly to 1Password 5, which is the latest and greatest version of 1Password.
You can find 1Password 5 for iOS in the iOS App Store, and 1Password 5 for Mac is available both from our website and the Mac App Store.
If you have any further questions, we're here to help!