I uninstalled Krita. Deleted the Roaming folders and all settings.
Reinstalled 4.1.7. I noticed as well that GMIC is in Krita’s main folder. So when last year I configured GMIC to be in a different folder than the default, I think that was when Krita forgot to update the one and only Rodilius favorite, every time I changed it.
Maybe I remember this totally wrong:
I remember having only to favorite a filter, like Rodilius only once and every time I change that single favorited filter, Krita should save & remember its settings all the time.
Maybe it got changed in the newest version.
Now, when I favorite the filter again, it creates a Rodilius (2) with the updated settings. Then I can delete (or keep) the old one or rename it. Finally my settings are saved in this new way: have to favorite the filter again with the new settings.
Thanks for the help, guys!
By the way I have the habit of always updating to GMIC latest. The one in 4.1.7 is old. I simply start Krita, leave it open, then download the latest GMIC v2.5.6 [currently] copy over all its files to the Krita folder and overwrite everything there. What it cannot overwrite, because Krita is running, I skip.
This way GMIC can be updated always to the latest.