Depending on the Winlator version you use you might get different options.
1 - Create New Container.
2 - Main Menu.
1 - Shortcuts - Here you will find all the application shortcuts you made within a container.
2 - Containers - Goes back to the main screen. All your containers are here.
3 - Input Controls - Menu with options and features involving the controller layout and remapping.
4 - Settings - Main application settings.
5 - About - Shows version, source, credits.