Sometimes it will work after reloading Facebook, once you click on the App Logo and sometimes it doesn't. I also have installed the add-on "Switch to Classic Design on Facebook," and if I then click on that App in succession, it will then revert back to the Old Facebook! Unfortunately, it'll only stay for 48 hours and then you'll have to repeat it all over again. BUT at least it does work for a short time, which I'm grateful for as I HATE the "NEW" design so much!