This page was only ever intended as a companion page for the hardware that was developed.
Sam Goldwasser took the ball and ran with it and maintains an extensive readme and his own version of the GUI here (which is far more up to date and advanced): http://www.repairfaq.org/sam/uMD1/uMD1.htm
Windows GUI for Helium-Neon Zeeman-Split Laser Interferometer
This GUI is made to interface with a microcontroller-based replacement for the HP5508A interferometer display. The build process for the hardware can be found here: https://www.janbeck.com/Interferometer1