/usr/share/mate/autostart/tilda.desktop is in ubuntu-mate-default-settings 16.04.5.
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 | [Desktop Entry]
Name=Tilda
Exec=/usr/lib/ubuntu-mate/ubuntu-mate-tilda
Icon=utilities-terminal
Terminal=false
Type=Application
Categories=GNOME;GTK;System;Utility;TerminalEmulator;
|