hey danny, i think you mean :"Jean-Marie Hullot (responsible for core parts of Mac OSX and CEO of Fotonauts)" instead of "Jean-Marie Hullot (responsible for core parts of Max OSX and CEO of Fotonauts)" the mac os x part =P
in the first place, the software is freeware, and you dont pay for it. only for the license and "30 day telephone support" and one year warranty and blah blah...
I believe that simplified chinese is the way to go. most chinese in the world with the exception of taiwan and hong kong speak simplified chinese. Of course, you might want to put up 2 sites, one with simplified and one with traditional chinese.