It is not that reliable of a system so don't expect it to work first try, you will need to refresh frequently. And about the scale issue? What would be preferable? And besides you can just press f4 on your keyboard to Fullscreen.
Edit: Do give it a moment to decompress it first and if that doesn't work, then refresh it.
2nd Edit: Sh*t nevermind. I'm just a dumbass. It should be fixed now.