The file /usr/share/mate/applications/gtkhash.desktop has NoDisplay=true.
It's mentioned here in "apt-get changelog ubuntu-mate-default-settings": ubuntu-mate-settings (17.10.22) artful; urgency=medium * Hide gtkhash menu entries. * Use Green wallpaper for Slick Greeter and Live Session. -- Martin Wimpress <mar...@ubuntu-mate.org> Wed, 23 Aug 2017 17:45:40 +0100 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1831323 Title: GtkHash icon is not shown in the MATE menus To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gtkhash/+bug/1831323/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs