About that I have a little problem
I wish associate a 3Dm file (created by Moi fev 2007) to Moi of Fev 9 2007
That seems impossible : it stay to version of Jan 2007

If I associate the icone of this file 3dm (created by Moi fev 2007) to another prog (Amapi for example) that work !
If I re modify the associate to Moi of Fev 9 2007 of this same file it stay always to version of Jan 2007!!!

Crappy windows system :( maybe i miss something but...)

Ok ! I have found something :Just rename the Moi janvier in Koi Janv, so the icone don't find it, and then I can associate with Moi Fev :)

But the renamed Koi Jan must stay renamed if then that restart :D :D :D

What jumble for nothing :D

Ps Now your new associate file works fine by clicking on icone :)