I went all the way back to my first posts and the side bar is gone from the top left.
I did go in and adjust fonts AFTER the side bar disappear, but not before. So I really don't think it's anything I did with the theme. If you want, you could restore the original settings to the theme (I'm not sure how to do that). Or tell me how to do that. But I'm pretty sure that's not it.
When I re-installed Chrome, I did it from explorer. But all my settings for Chrome remained the same. Should I have de-installed Chrome first than re-stalled it? I wonder if it never properly re-installed...