Ok, brief summary of the issue, I installed XFCE4 on Debian the other day just to try it out and now when I go into main folders such as Home etc... it'll open up in Nautilus but if I open up bookmarks or use Alt+F2 to open up folders it'll use Thunar. Which has its issues especially when communicating with Nautilus.

In any case I think I can see where the problem is. If I open a folder in nautilus and go to the folders properties (Right Click -> Properties). Then go to the Open With tab Thunar is selected. My issue is it wont let me change the option from Thunar to Nautilus (Image provided here).

Any Clues?

P.S. I have tried Uninstalling Thunar, that just leaves me without a browser option for the bookmarks and Alt+F2, so no solution.

Cheers,