xml files from Kodi 16 not used

I copied my advancedsettings.xml, mediasources.xml, password.xml and sources.xml out of .kodi/userdata, and removed Kodi 16.
Then added the unstable repository, and installed Kodi 17.

I then started Kodi 17, and exited. Then I copied back the xml files.
But for some reason only the mediasources.xml is read. I can select my NAS location to add sources.
The advancedsettings.xml isn’t read, since it creates a local database, instead of the using my MariaDB (MySQL) database and none of my sources are added.

Maybe I missed some information, but I can’t find it here on the forums or in the announcements.
Are certain things done differently for Kodi 17?

Running Ubuntu Server 16.04.01 LTS, fully updated, on a Intel NUC.

Any help is very appreciated.

PS: I hope I picked the correct forum…