You will have to re-create the project again and define it. This is the primary requirement for the dialog box to appear in Geomedia. It works for the Open function as well, but it's best to start from scratch. If you can't see the dialog box, use the menu bar to look through Windows that can be activated. They're usually in the View or Window menu. Alternatively, use Alt + Tab a few times, because the window can be hidden in the background of the app.