No menus appear onscreen. what to do? Ver 5.3 downloaded 2 days ago

That’s basically it. No menus appear at the top of the screen.
It will pull up docs, spreadsheets, but I can’t save them from there. Have to exit and then it asks if I want to save???
There IS a wide, deep white bar at the top of the screen which may be covering the menu???

Please, say what OS you’re on, and what version of that OS. Thanks

Assuming you had a valid installer (you checked HASH value right?), and that it went on clean–I would suggest you start with a reset of your user profile:

https://wiki.documentfoundation.org/UserProfile

If you have a lot of customization, do make a backup so you can restore.