The thing is that I can't provide you with any of these further informations at all, since the program locks on start.

I describe it again: Whenever I launch the application, it immediately throws an error box with the "viking/beard" icon and the sentence: "Demo mode enabled. Please connect to the internet and restart the program so that Blacksmith3D can check it with the server"

The box only has one "OK" button, and this button does nothing. The button reacts with a tiny "flicker" when I click it (so it "responds" and is not frozen) but the box stays open and that's it. On top of the screen there is the "Blacksmith3D" menu (right beside the "Apple" menu), but it is empty - no menu items, especially no "Quit". And of course it doesn't respond to Command-Q.

In other words, it is entirely locked and the only way to stop it is to envoke the "kill process" window in the Finder and to shoot it there. I would love to send you a screenshot of the registration dialog, if only the program would actually step anywhere behind this error box. Will mail you a screenshot later this day.

I did buy an upgrade license from version 5, so I guess that I actually entered that key. Can't remember it, long time ago (by now). My address details do not contain diacritical characters.