Becky, try going to the icon with the faint pic on it, just left of the film-strip, which is just left of the paper clip. Click on it, then a box will come up and then click "choose file". That will direct you to your computer, where you will select the file with the pic. It seems odd at first, but I think the new method of posting pics is far superior to the old.
I'll try that but I was trying to choose a picture from my uploads. I tried both ways posted here:
https://www.backyardchickens.com/t/620258/how-the-neck-do-the-pics-work-now
and neither one worked for me.