This is what I discovered. If clicking with the left -cursor - mouse doesn't work, then try clicking with the RIGHT -cursor - mouse, which opens a box. the box has a list of things you can do like "Open" and if you click that -It opens!
and if you are faced with a blank page, the box will say "Back" ( among other things) and by golly if you click "back" it goes back to where you were!
The only problem is when should I use "Right click"???? I guess when "left click" doesn't work?