How did you install Stardraw AV 2007 on your Windows 7 Machine? Did you upgrade to Windows 7 from Windows XP ? Or is this a new machine?By default, Stardraw AV 2007 will place your System Attributes Excel Spreadsheet in your templates folder, which you can configure in your Library Paths.
Windows 7 is stricter on who can write to files in your Program Files directory - you need to have administrator privilege to do so. As a quick workaround, you could run Stardraw AV 2007 with Administrator privilege by right clicking on the shortcut and choosing "Run as Administrator".