Never noticed that it displays the filename... probably because I have been doing a lot of file conversion and I import each file to a blank Moi scene.
(so it obviously wont show the file name when it hasnt been saved.. whoops!)

>Opening up some other type than .3dm does not set the current filename, which is intentional since other file types do not store 100% of the information that you may create in MoI. >For example an AI file can only hold 2D curves and not any 3D data.
>If other file types became the current filename when they were opened, it would just be too easy for you to lose data when you hit the "Save" button.

ah, makes perfect sense now :)
I usually import other file formats anyway so that I don't save over them - in most applications; but I think that is because they force you to import instead of open a different format.

Thanks Michael