top menu bar disappeared after upgrade to Mojave

Problem solved . . . It was my stupidity. I had a second desktop opened which I didn’t know about. This second desktop doesn’t have the top menu bar. Once I closed it, the main desktop had the top menu bar intact. I appreciated your ideas this morning: They led me to the solution.

Thanks . . . I guess I should have been more specific. It used to be that the top menu bar contained drop downs like 'System Preferences', 'File' etc. Those have disappeared. I can't, for example, do 'File Save As' (for example to convert a .pptx to a .pdf.) It also had a drop down for 'System Preferences'. Now, it is not there.

It seems in all apps . . . but certainly in Word and PowerPoint.

Nothing happens I'm afraid. The left side of the top bar is simply empty; the right side contains all the other drop downs I have (Evernote, Dropbox, volume controls etc.

Thanks . . . I'll give that a try later today. I very much appreciate your efforts to help 🙂