Hi Alex, I can't repeat that over here with the Oct 10 version, also on Win7. Here's what I'm doing, use File > Open and go to a folder and open a .3dm file. Then close MoI and reopen it and use File > Open again and I start out in the same folder.

Are you using some other method to open the file?

Is it possible you have moved your moi.ini file to a location where it is read only?

The way it is supposed to work now is that the last folder used by a file dialog is saved in moi.ini under:

[Settings]
<....>
LastFileDialogDirectory=C:\folder\

Do you have anything in that?

- Michael