Today I downloaded 5.7.4.2. I'm using the elements theme that is automatically installed (I did did try fruits, with no success also). I am unable to edit anything! When I click on the pencil, it turns green, but no boxes are highlighted green and I cannot edit boxes, pictures, or anything! It should be simple but it just isn't happening. I've read through the forums and cannot find a solution. Any help would be appreciated!

Screenshot of Command Shift J attached!