update Excel for macOS Mojave
A message about the need for updating Excel (and Word) to Mojave pops up every time the app are opened.
For me it's a panel fill window width immediately below the ribbon (around half the height of the ribbon.
For reasons now in Level 3 MS support I cannot upgrade without losing significant parts of my spreadsheets so have to stick on 16.25 until it's fixed and this warning banner is driving me mad.
Most "update" nagware includes the options "Skip this Version", "Remind me Later" (e.g. in a few days) or "Install Update". Better if MS provided the same options.