Please contact me via www.ficlab.com/contact for assistance. I answer every single support request received via that form, usually the same day.

If you did not receive a reply to your original message, then this most likely means there was a typo in the email address you provided, and my reply to you bounced as a result - this is the most common reason for my being unable to contact a user.

Regarding your specific problem - that is the result of a bug in Firefox that occasionally causes problems with the download API. Fully restarting your browser (or rebooting your computer) will resolve it.