I forwarded your email to proper person because you emailed directly to me and I am not responsible for
You didn't provide enought information to solve the problem however I guess that a problem could be with the Safari. Maybe the solution could be to use a download link without login and password included and then enter them in appropriate window.
There is no bug 1.6.6 - it is an imcompatibility vs 1.5.3 and all VintageWarmer customers should have received the email including version history and information about changes.
Regards,
_________________________
Mateusz Wozniak
PSPaudioware.com