Arch Linux: XFCE4 ignores default filemanager settings

Issue Description

When you double click on a folder or open a folder with a right click and "open" from the context menu XFCE4 uses Thunar instead of the configured default manager Caja.

Caja is used when entering "exo-open --launch=FileManager" in terminal or pressing the hot keys to open a new window.

Steps to Reproduce Issue

1. Double click on a folder
2. Folder content displayed with Thunar

Expected Behavior

1. Double click on a folder
2. Display content with the configured default Filemanger

Additional Information

XFCE4 is running on an Arch Linux rolling release for some years on the affected notebook. Issue raised with the latest system update.

My ~/.config/xfce4/helpers.rc FileManager=caja

Environment & Versions

• OS distribution and version: Arch Linux
• Overall Xfce version: 4.20
• xfdesktop version (git hash if not a release):
• Windowing system (X11/Wayland): X11
• Compositor and version (if Wayland):
• GTK Theme:Adwaita dark
• Icon Theme: elementary
• UI Scale Factor: 1x