how to know if a file is legacy?

Hey all-

does anyone know if there is a way to tell if a MicroStation file is V8i or CONNECT before opening it? Is there somewhere in the properties of the file one can tell in Windows explorer? 

As we have users migrating to the new software, we are finding even with the notification that files are being converted (if double clicking it, which is a no no, we know.)

Thanks