What happened to DK theme on Win?

For the past couple of releases, I’ve been getting some strange theme look on Windows 10:

I’ve uninstalled and cleaned all the folders left by Digikam in my user folder, but after a fresh install, I still get that basic theme look.

Any hints?

Never mind, I figured it out.
For some reason the setting in Miscellaneous/Appearance/Widget Style at some point changed. Anyway, applying Fusion fixed it.