Emulator defaults to iPhone 4, cannot change

After I build my ionic app and run the emulator, xcode/iOS simulator defaults to the iPhone 4. When I go to the menu Hardware->Device and select another iPhone, it goes to a new screen but never opens the application. How can I set this to default to an iPhone 5?

I have a second but less important question as well, how can I load the iPhone skin in the emulator?