Kodi releases / updates

I recently installed Kodi (Leia) after replacing my FireTV. I had put off updating (from Krypton) because I was unsure if it would delete my preferences. I had spent time to install and configure skin, add-ons, etc. I hope to update to Kodi 19 when it’s stable.
So I have 2 questions:

  1. Will updating to new Kodi versions change current configurations?
  2. Can I update via Rapid App as I do with APKs?
    Thx in advance.

I recently upgraded from 18.1 to 18.5. I used troy’s rapid app installer, just downloaded the new version and installed it. Opened up new version, skins, add-ons were intact.

That’s good to know.
Thx!