While you were offline, I did a bit of digging around on the internet, and I came up with the following:
A. Press Alt key to temporarily show old style menus.
To show them permanently, right-click on an empty section of the tab strip and check Menu Bar in the pop-up menu.
B. Click View, then Toolbars, click Navigation Toolbar.
C. If Navigation Toolbar is hidden:
right-click on empty section of tab strip.
pop-up menu appears. Click Navigation Toolbar.
Try B first, it looks as if it might help.