I've stopped using beta versions of 1Password.
The Mini app that sits up on the menubar has been failing when needed. This stops the browser extensions from working and in turn forces the main app into trying to find the Mini app, which by now is intermittently appearing then vanishing from the menubar. No resets of the app or Mac restarts will fix this problem.
So I fully uninstalled it, leaving only the Dropbox sync stuff & the software licence on the Mac.
I installed the latest non-beta version & it's all OK, it detected both the licence & the Dropbox sync info.