I never took the time to wrap my head around Matmatic, I always thought loom was mighty impressive though. That being said, it might work with 11. It might need Snarlygribbly's AVFix...

https://www.poserlounge.nl/PLWP/fix-for-scripts-in-poser-11-2/

Still no guarantee it'll work with AVFix.

I would try Poser 8 if it were me but then you might run up against the Library problems.

Barring all else you could Site Mail BB and cross your fingers that he's at the lower range of Curmudgeonly Amnesiac mode.

It's a lot of hoops/hopes.