so i downloaded an app of installer ...i think it was like a costumize app. and it installed but now it has changed my settings and walpaper and everything. and itunes wont even read it.. and i when i restart it it goes back to how it was....can anybody help me fix it some how...it wont even let me open any of my apps. it does .then it crashes to the home screen right away!!!!!!!!!!!please help thank you very much!!