Following the instructions in Kolourpaint missing all icons on Ubuntu 20.10 after upgrading to Xubuntu 22.04.1 I do now have icons in kolourpaint, but they are the Breeze theme which I actively dislike (monochromatic, flat and unintuitive). How do I change it to use elementary, oxygen or indeed any of the other actually usable icon themes?
Menu-Settings-Appearance says I'm using elementary-xfce-darker and there are no options directly in kolourpaint I can find to change the icon theme.