Hi, the FAQ says "Q. Where can I get an update?
A. You'll find updates in the download section of the web site, under Software / Updates. For downloading them you'll need your user ID and password that is displayed under Help/About of WED or SED."

But I can't find it inside http://www.3dgamestudio.com/download.php @_@

There is no download called "update".
To update gamestudio, you have to download the newest trial version, then install it in the same folder as your old version.

Thanks the_clown, they should fix that manual, lol.

You're welcome.