On my nexus 4, that has kit Kat 4.4.2, I can't choose if I want to use an application always it just once. today I accidentally pressed always and I can't don't know how to info it. For ex if I had go laincher, every time I press the home button it ask which launcher app I want to use to get to the home screen. But if you press, use go launcher every time when you don't want to then you have a problem. I really need help . my phone isn't rooted.