I already sent a message to Conitec, but I haven't got an answer yet and I need an answer (don't know if this is the right place):

About two/three years ago I bought 3D Gamestudio Extra with the Acknex 6 engine. Installation went fine and I had lots of fun with the program. But since this morning I have a new computer (with Windows Viste Home Premium btw) and I tried to install the program. But then I got a problem -> I installed the demo version en then I opened key.exe to install my bought version of 3D Gamestudio. But when I hit Unzip in that exe-file I get the following error:
Can't create output file c:\Program Files\Gstudio6\bin\acknex.exe (see enclosed picture)

How can I solve this stupid problem?

Thanks!