I have fiddled around in
$ sudo nano /usr/share/themes/Matcha-dark-azul/gnome-shell/gnome-shell.css
and changed some settings to make GNOME to look more the way I want to.
BUT now everytime, when I receive some certain updates for my system, all these changes to gnome-shell.css are lost.
Is there a way beside copying the specified file in order to restore all settings?
Greetings and thanks for any help!