I can't tell which of these is supposed to be selected and which is unselected and it's like my 3rd or 4th time through it and I don't remember from time to time to try to do process of elimination. Not great UI design...
Maybe I seem stupid and it is supposed to be the state with it glowing and a line around the box, but that is the same color as the "play" button, and normally it would be a square line *inside* the box (or something inside it like a check mark or x). It looks like you're supposed to click the default state to make something happen (enable it). Also often these are darker when enabled/selected to indicate that it has been "pressed".