Thank you for posting your problem!
We have extensively tested this download program, and it works for all of us at MTU. We will test shortly on a computer that has never had Vogone installed on it, which may shed some light on why you are seeing the RegCode failure.
Since some folks were thinking our release versions were identical to our demo versions, including the demo not registering, we decided this time to include a "mock" registration to show what registering is like.
Our lead programmer will be on this tomorrow to insure we have the correct demo for downloading and that if it has a bug, he will fix it.
Until tomorrow...