What is in your ~/.local/share/applications/ directory? If there is a file hplip.desktop, hp-toolbox.desktop, or any other hp-*.desktop, delete them. This should fix your problem. If nothing happens immediately, log out and log in again.
-- [Feisty] Clicking on HPLIP Toolbox in gnome menu does nothing https://launchpad.net/bugs/86893 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
