How to prevent Nautilus from starting in KDE?

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http://askubuntu.com – I have KDE installed in Ubuntu (not Kubuntu) and the Nautilus starts with it. But it should start only in GNOME or Unity: $ grep OnlyShowIn /etc/xdg/autostart/nautilus-autostart.desktop OnlyShowIn=GNOME;Unity; Uninstalling Nautilus or saving the KDE session is not an option. It should not start at all. (HowTos)