/usr/share/mate/applications/tilda.desktop is in ubuntu-mate-default-settings 18.04.17.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [Desktop Entry]
Name=Tilda
Exec=/usr/bin/tilda
Icon=tilda
Terminal=false
Type=Application
Categories=GNOME;GTK;System;Utility;TerminalEmulator;
NoDisplay=true
|