Lots of changes, specially a new XML based file format that allows the inclusion of special tags in your models.
More info here:
http://www.delgine.com/forum/viewtopic. ... 6129#16129
Grab the free version and give it a ride, however to be able to work with Irrlicht you'll probably have to export to b3d (which works great).
BTW, all plugins have been re-issued to work with the latest version:
http://www.delgine.com/plugins/viewPluginCategories.php