I am running 1Password 6.3.2 (downloaded from Agile Bits site) and receive a pop up that states the following:
"Updated Version Required Your saved data appears to be newer than this version of 1Password can use. Please update your copy of 1Password to its latest version."
I even signed up for the new subscription model and installed the app from the web account and this is still occurring.
1Password Version: 6.3.2
Extension Version: Not Provided
OS Version: 10.11.6
Sync Type: Dropbox
Referrer: forum-search:updated version required