I decided to check out the macOS beta to see what feature changes might be coming, and discovered that I can't switch back to the stable version. The instructions for doing so on the website were as follows:
However, it is not possible to do so, because the checkbox for "Include beta builds" is disabled:
I guess my only recourse is to uninstall the beta, reinstall the stable version, and re-enter my credentials?
1Password Version: 7.2.5.BETA-0 (70205000)
Extension Version: Not Provided
OS Version: macOS 10.14.2
Sync Type: Not Provided