On my N7, when I choose a pic and hit 'edit' it gives me a choice of two editing programs, both of which are worth using for different things. You choose which one to use and press either 'choose once' or 'always'. Suddenly it doesn't give me a choice and opens in one, and I can't find a way to get to the other. How do I bring my choice back? I tried resetting all apps but nothing changed.