Backup/Restore essential things

Hello all,

I would like to start from a fresh install (cleaned up from add-ons, beta versions, tries…), but without having to setup again essential things like interface parameters (personalized menus…), system setup (IP address of the Pi, connection to centralized MySQL DB…) and things like MPG2 or WVC1 I bought.

What folders should I copy (and not copy to not include obsolete things ?)

Thank you very much Smile