I thought as much.
I was hopping that I could open these files in new maya versions. We have about 40 characters all rigged with Final Rig which was a brilliant plugin for rigging but it is no longer supported thus keeping our work flow in Maya 7.
Is it possible for someone to re compile a plugin make it compatible with new versions?? Some smart dude out there could do it i'm sure.
It is by my will alone I set my mind in motion