To edit basic properties of the program, you need to click "Edit Parameters" button on the right window. After this, some elements of the window become active, so you could change their state, selecting new properties for your application ( you must know, also, that preview regime is locked during the edit session ):

     Here you could change the description of the application you created. Using description could be convenient for work with the archive of projects - you'll be able to recognize necessary project for load due its description. Next parameter you can change - "Application type". You can select application based on basic Windows object - window, or application based on dialog box window. Also, you can insert special object - wallpaper - into application, to start your application on the special background.
     To accomplish edit session, click "Save Parameters Value", or "Restore Previous Parameters". If you want to save corrected GUI, don't forget, please, to visit "File" panel and select "Save Current Project As".