I rooted my brothers bionic running .5.5.893 a few months ago when he just got the phone. Now we wanted to unroot to do an update then root again. I unrootrd it then we realized that he needed to back it up or he would lose his app data. So now attempting to reroot it errors in the middle of it. Is he screwed? He doesn't want t lose his data if at all possible, can we save the app data manually?