At first I was baffled that the new version 4.3 is no different from my old version. I now see that version 4.1.2 is still installed.
I originally bought 1Password online, and so found remnants of older folders in the Library directory. I tried to deactivate all files by relabelling everything as *_OLD, as per your online instructions. However, v4.1.2 still launches and the app store still thinks I am updated to v4.3. What can I do?