Thanks for looking into this futher. You say the issue is only present in MATE Menu? Not the Apllications Places System menu? After you edit files in `/usr/share/applications` you need to run `update-desktop-database -q` for the changes to be picked up.
Thanks for looking into this futher. You say the issue is only present in MATE Menu? Not the Apllications Places System menu? After you edit files in `/usr/share/ applications` you need to run `update- desktop- database -q` for the changes to be picked up.