How to prevent 4.6 to delete existing music information?

[EduardoSantos 40]

As I read the release notes, Emby 4.6 version brings a lot of new things on music. These are very good news.
From there I learned there's one configuration that preserves the old AlbumArtist\Album file structure.

That should be done for every library and will also preserve existing nfo files and their info.

But as I install the new version, it will assume, as a default, a "tag oriented" configuration.

So...

How can I set up the "file structure" option on each library to preserve existing info before server update and thus prevent data being destroied on new version's first scan?

[pwhodges 2012]

The system will use the tags to form the main displays, and it is merciless in exposing inadequate tagging!  Note that if you have a lot of music the initial rescan of your library may take a long time, especially as everyone upgrading together is putting a big strain on Emby's MusicBrainz server.

You can instead choose the folder view, and unlike before, this is a true folder view that doesn't get sidetracked into being tag-driven at the end.  The downside is that track listings, when you reach them, are very much simplified compared with the expected "album" view.  This will be improved, I expect, but will never be the same.

Paul