Unroot Ender 3 V3 KE

Ender Series Creality Ender-3 V3 KE/SE
1

Is it possible to unroot the KE?
If i take the firmware file , put it on an USB flashdrive , connect it to the printer , and boot it up , will it install the original firmware?
Thanks

2

On GitHub there is a guide for installing the firmware using computer,

3

Reset it to the factory settings, in the nebula menu. It will unroot.