Reinstall CE on internal Storage

Hey Guys, I have successfully installed CoreELEC to the internal storage on my AM6B+ and connected it with smb in my network.

  1. Is it correct that I can neither find the dovi.ko nor the remote.config in the folder system anymore, although they were copied from my USB stick while installing?
  2. What is the safest way to delete CoreELEC from the internal storage and then do a clean reinstall with the USB Stick?