Copy the minecraft worlds from the file explorer
you link it to your minecraft account
Minecraft
No.
yes.
No, only if you delete your .minecraft folder, minecraft isn't 'installed' so you can't uninstall it either, just deleting it from your desktop does the trick, all your worlds will be left alone.
Well there is one way to get into good worlds in Minecraft. Type in a seed.
minecraft worlds on PE are finite, and the water beyond that is infinite.
Sambotambo0.0.4
go to options, and force update. this will restore your minecraft jar and make it run again.
No it doesn't because it is just like force upating but you do need to update your worlds.
delete your BIN and then run minecraft, it will then be cleared and restored, this doesn't change your worlds.