Actually that one is payble. This one is free...
Free registration required after 10 days.
Be prepared to a lot of spam... This is my personal experience... they would try to sell *any* ashampoo product...
They are spreading wrong info. You can register but it doesn't matter if you don't, as you don't get any registration key and there isn't any field to enter any key either.
I registered at first because it offered registration but later found out it's not really necessary. I think i got some news from them at first, but i've unsubscribed from Ashampoo newsletter and haven't got any mail from them since.
So it's just download and use, nothing else required.