I downloaded an app called fingerprint scanner lite n the next time I pressed home it asked which launcher I wanted 2 use. I pressed home (obvious choice) n now my extra home screens only extend 1 in each direction. Also, my apps r vertical instead of sideways n my widgets r all gone. The bottom line where normally the phone, contacts, messaging, n apps shortcuts r is gone replaced by only a grey arrow that brings up the vertical apps. Please help me what's going on with my phone n how do I fix it??