Deleting that .desktop file would let Thunar show up as "Thunar File Manager" in whisker menu (generic application names are not shown by default).
Similar case: "Web Browser" and "Firefox Web Browser"
Deleting that .desktop file would let Thunar show up as "Thunar File Manager" in whisker menu (generic application names are not shown by default).
Similar case: "Web Browser" and "Firefox Web Browser"