Exclamation [Q] Settings app missing - Android 4.3 Xperia

My settings app is gone! I need it back!!! How could I get it back? I tried copying stock 4.3 settings but nothing!
I have an Xperia E1, but the stock 4.3 settings app should work too, since it's running 4.3. I do not want to lose data though, so reflashing with data loss would not be good.