I have to point out that OS X isn't a supported platform for FDS, but it's a well-behaved J2EE app, so you shouldn't have much trouble for development purposes.
I downloaded the AIX installer, which is a ZIP file, renamed it to have a .JAR extension and followed the java -jar instructions. It beats me why it has a ZIP extension; I'll look into it and change the installation instructions, if necessary. HTH Randy Nielsen Flex Documentation Manager Adobe Systems, Inc.