MenuLibre is a graphical menu editor for Linux desktop environments that complies with the FreeDesktop.org Desktop Entry and Menu specifications. It allows users to create, edit, and manage application launchers (.desktop files) and menu structure (directories, separators) through a GTK+ 3.0 interface. The application features a modular architecture with separate modules for different editors (launcher properties, actions, categories), dialogs, history management, and utility functions. Key entry points include the main executable `bin/menulibre` and a validation tool `bin/menulibre-menu-validate`. The system relies on external dependencies such as GTK+ 3.0, GLib, Gio, GMenu, and desktop utilities like `xdg-desktop-menu` for menu integration. Data flows involve reading/writing .desktop files via GLib.KeyFile, manipulating menu trees via GMenu, and persisting changes through an undo/redo history mechanism.