[Evolution] "Unmatched" search folder

[Volker Wysk <post volker-wysk de>]

Hi

I've created two search folders, and needed to restart evolution for
both of them to appear under "Search folders". But now I have an
additional search folder, named "Unmatched", which contains a lot of
messages, but I don't know the criterion.

How to get rid of it again?

I'm using 3.34.2 (by Flathub.org).

Cheers
Volker