From the blog post:
"This release, version 5.3.0, has added support for the Windows 7 operating system, support for both simplex and redundant H1 cards of S series with Integrated Power Supply, and numerous field devices from a variety of manufacturers. The Segment Design Tool is compatible with the Windows 2000 / XP / Windows 7 operating systems, but none of the Windows Server platforms."Read more here:
Emerson Updates FOUNDATION Fieldbus Segment Design Tool
Also, here is a blatant plug for our own free segment design tool at the Fieldbus Foundation, called DesignMate!