if you use the close X (not the main program one) to close your program, it doesn't ask if you want to save changes. Then when you totally shut down construct it asks you. if you loaded more than one project, it's difficult to tell or remember which project it's talking about. Also, since it's not standard windows app behavior, it may be confusing to users who may not realize it's asking about the changes for a child window no longer visible or retrievable