Version number is not being updated when update is installed.
"Word>About Microsoft Word" shows that my version of Word is out of date. (Currently showing 16.16.10.) So Microsoft AutoUpdater shows that it needs to be updated. Yet when I Control-click on the Word icon and select Get Info, it shows the current version, 16.16.15. The problem is that Microsoft AutoUpdater appears to check the version number shown in About Word to determine whether or not an update is needed, so it's constantly trying to update what is already the latest version.
