Vince

Reinstall it and relogin your desktop

This app do not use icon theme [Desktop Entry] Version=1.5 Name=OpenTabletDriver Comment=A cross-platform open-source tablet driver Exec=otd-gui `Icon=//usr/share/pixmaps/otd.png` Terminal=false Type=Application Categories=Settings; StartupNotify=true

Wine app ?

You can use bottles: https://usebottles.com/ to remake a starter, it'll use windows's app icon

You need to run `./install.sh -c dark -l` to install dark theme for libadwaita apps

Re-login your desktop or restart your nautilus

This theme only works for Linux, not support Windows

Does this issue still exist?

Could you show me a screenshot ?

Did you installed `User Themes` gnome-shell extension and use gnome-tweaks to set the colloid dark theme ?