Hi Pilou,

> And last curious thing : the fact to change the Shortcut for a version ("appdata" for Beta V4 - not "appdata" for the V 3)
> changes also the Shortcut for the other version of Moi! A true ghost story! :)
> I suppose that's explaning my previous "White window" !

Shortcuts are stored in the moi.ini file and by default both MoI v3 and v4 will use the same moi.ini file, so that's normal.

You can set up an individual shortcut that will do different things depending on whether it is running on MoI v3 or v4, or it is also possible to make MoI v3 and v4 use separate moi.ini files instead of sharing the same one, see here for how to set those things up:
http://moi3d.com/forum/index.php?webtag=MOI&msg=9266.194

- Michael