Can you kindly press the "Alt" key. This should make the menu bar visible. Then press the "T" and then "C" key, This should bring up a dialog box. Enable the "Menu Bar". This should display the Menu Bar permanently. Enable the toolbars whichever you want active.
Hope this should resolve our issue. Do kindly let us know.
Thank you for your reply.
I tried the ALT key but the menu bar didn't appear. Any other points to check?