XnView Software

Pierre,
thank you very much.
So, does that mean, I - as a user - cannot change this in any way, like it is "hardcoded" in the program?
Or is there a way I could change it?

Hi,
I am working on linux. And in the linux-world there is only one, really only just one program that can rename RAW-Files toghether with their xmp files.
This program is KDE's "digikam".
But I would rather work with XnViewMP because I find its quick feature-rich AND cross-platform (!).

Could we ...

I tried out and installed XnviewMP under a KDE-Distro (KDE Neon).
The folder-icons that are used here seem to be "oxygen", so the (older) default-icon-theme in KDE.
( I attached another screenshot here).

So the two default icon sets are choosen:
Gnome: Adwaita
KDE: Oxygen

How can we change this ...

These icons look like Gnome's "Adwaita". So the gnome default icon theme.
Is this perhaps build-in (kind of "hard-coded") in xnviewmp, or does the program get this from the system? (in the 2nd case we should be able to change it, or not?)

How can I change the folder icons or used icon-theme under linux?
Please have a look at the attached screenshot to know what I mean.

Searching for a solution for month now