With the 3Dm file or the obj file
You must trim the surfaces who are "yellowed" when you launch _subdivbeta9 by max Smirnov!

Separate all: take faces concerned one by one : Boolean trim by a perpendicular (normal) plan for example

Then when all faces with problem are trimed select all / Join and launch the _subdivbeta9

But I believe that you will have a very "bloby" result! :)

Here the vertical face on the right was trimed by me!