SilverFast Ai (Epson) Perfection 4870 - 6.4.4r7

I have been a SF user since 2005. I am a professional designer and photographer and used to use SF for my work on a daily basis.
When I purchased a new Mac Pro workstation last year I had to upgrade SF to version 6.6 in order for it to work with Leopard and Intel. Since then it has not worked. Every time I launch it, whether through the PS plugin or standalone, it gives me a "scanner not found" error, and either quits or I have to force quit it together with PS losing my work. Apple's Image Capture and Epson's Epson Scan find the scanner immediately. Ironically, using Windows XP via Boot Camp with the same version of SF works fine as well.
I am a veteran Mac user with good technical background. I keep my workstation up to date, and check it for problems regularly. I can see clearly that this version of SF is problematic, but support only replies with general solutions like reseting, re-installing, checking permissions, etc. I have been very specific in my description of the problem numerous times but I do not get professional and specific responses. I use many other products, and I have worked myself in software companies for many years; I can see clearly when I am dealing with a low quality product. Even when it did work in prior versions, the software seemed outdated and buggy. While the scan technology produced great results, the usability was awful. The interface is amateurish and belongs to the early 90's.

I have tried to post my problem in their forum twice but the post did not appear.
I cannot find anywhere on their site a customer service address, so I sent my request to sales, after giving up on the support team, but I did not get a response from them as well.

I currently do not want any explanations or support assistance - just my money back. I am infuriated and disappointed from this attitude, and surprised by the lack of professionalism. I've never experienced such apathy and disrespect from a "respected" company.

Using the default settings on both of these plug-ins the Epson scans were almost perfect and Silverfast were unacceptible. I imagine a more skilled person could get better results but if you are doing mostly reflective art I would save the money and use what came in the box.