Not sure if you figured it out, but in the grey bar at the top of the page it should say "You own this simulator" followed by a download button and the date you bought it. It will still say "Buy Now" under the purchase section in case you want to send more money evan's way ;)
I had similar problem. The "grey bar" at top of page didn't show up because I wasn't signed into my account, and no sign-in option was visible. I was able to sign in after trying the "Follow Evan" option. Then the grey bar magically appeared.
