NVIDIA has finally released updated version of PhysX plug-in for 3ds Max. New major 2.7 version of the PhysX plug-in is still in development, so this minor 2.6+ release is supposed to resolve compability issues with RayFire, and also add support for 3ds Max 2012. In this case, plug-in installs above default MassFX simulation tool, replacing it and providing additional features, like support for APEX Clothing (and if you’ll uninstall PhysX plug-in, MassFX will be restored).
It has fixed bugs which were in MassFx so with this version you can use Interactive Demolition and Force affection.
To more information and to download it visit: Physxinfo