Custom XFCE Launcher Menu Items
When an application fails to register a menu shortcut, you can add one manually by creating a file in /home/<username>/.local/share/applications/
Below is an example of a shortcut to robomongo.
robomongo.desktop
#!/usr/bin/env xdg-open
[Desktop Entry]
Version=1.0
Terminal=false
Type=Application
Name=robomongo
Exec=/opt/robomongo/bin/robomongo
Icon=office-database
Categories=Development
I typically identify available icon names by right-clicking a launcher item and checking what icons are available to change to.