no way out of "error opening file" dialog box

When the user opens a ScreenFlow project and the ap can't find a file associated with the project, a dialog box appears. It says, "Error opening file -- Screenflow was unable to open the file ...[file path/name]." It goes on, "You can select a new location for find this file, or remove it from your document." Aside from the typo in this window, there's a serious problem here -- there's no way to exit out and close the window at this point, either to open a different project or to review your files/folders so that the paths can be corrected. There are two options here, "remove" and "select". The user can't even quit the ap from the dock or menu bar; a Force Quit is required.