Thank you, both, for your replies.
My screen looks like the two screenshots that Dave-in-Decatur posted, except on mine, the third column is completely white, and I can see all of my note. I guess that's what it's supposed to look like.
An interesting side note: It only looks like this when I login from the shortcut. When I access Evernote through the website, it looks like what I am used to. It has a green border around it with the Evernote elephant visible, and the print is a little bigger.
I decided not to sweat it, since I primarily use Evernote on my phone or tablet, and since all my notes seem to be there.
Thanks, again, for your help.