When creating real world xUML UI projects the basic setup of the UI project structure would consume some time. Therefore the Builder offers to create a new UI project using a template with a basic setup of the project structure. During the creation of the HelloWorld UI Example, the setup and structuring was only done manually for learning reasons.
To create a new UI project select File > New E2E UI Model either from the main MagicDraw File menu or the xUML Compiler's File menu.