Opening fdf files

I'm stuck at a problem I see identified in forums going back four years - properly translating unusual fdf files from investment sites for tax purposes. Safari and Adobe Reader 8 are supposed to handle them but they don't. I downloaded fdf-Converter and installed but now cannot find it to use it to convert the TaxFormsServlet on my desktop - which is not arranged as a table - just lots of caps and code. Had a similar problem with the USPS site and Adobe Reader but couldn't get it to work with Safari and switched to a work-around using Netscape. But that produced a servlet I could print out - this one doesn't.