This developer makes very good programs and this appears to be one of them. No problems downloading, installing, requesting the license number and registering the software.
However, in the past I have been flooded with spam from this developer after providing my email address to register. Someone mentioned you can opt out somehow of the spam, but as it is all in German, I believe, I have no idea how to do that. So, the one or two spam emails I receive DAILY from Engelmann News are deposited into my spam folder.
Again, thanks for the program, no thanks for your spam!