FYI, using OSX Mountain Lion trying to open a file with the .ormdesigner extension.
Contents of file looks roughly like this ( using ... to fit content in char limit of comment post ):
<?xml version="1.0" encoding="utf-8" standalone="no" ?>
<orm-designer version="1.4.5.478">
<include name="xml\access.module.xml"/>
...
<project code-name="..." description="..." name="..." orm="Doctrine" visSizeX="350" visSizeX2="6600" visSizeY="250" visSizeY2="3550">
<module-position name="Access" visPositionX="2859" visPositionY="51"/>
...
</project>
</orm-designer>