I use kfind on Ubuntu. I need to set the default apps it uses to launch files it finds.
By default, it attempts to launch kde apps. I usually either don't have them, or don't want to use them.
I most especially want it to launch Thunar when I click 'open parent folder' on a search result.
But I cannot see where to do this. I installed 'systemsettings', the kde config app. But that seems to have no option to set default apps. I looked in ~/.kde/share/apps/ and ~/.kde/share/config, but could find no config setting. I can't see any version of kconfig or kcontrol to install.
So how do I change this setting for KDE apps in Ubuntu?
In answer to Michael Clare (thank you), xdg-mime thinks my default is Thunar. And indeed it is. But not for any KDE app.
$ xdg-mime query default inode/directory Thunar-folder-handler.desktop