It took me 30-minutes to find this button that they hid earlier today. Apparently, if you have any ads active in your Facebook Ads Manager you have to click a small gray button in the upper corner labeled “Discard Changes” before you find a replacement button to the giant green button that used to be called “Create Ad”.
I would not be surprised if they lose millions of dollars by not documenting this change. See image below. I also found this article by another reporter that shows some of the less important details of this update: http://ipoh.ly/jdj43