Hi Jesse,
It was built and tested on Windows 7 Pro 64-bit and I tested it on Windows 8 64-bit so I don't think this has anything to do with the windows version. Ultimate just has some extra stuff-- it's not functionally much different than Pro.
Blimp pulls the fonts from windows so the main thing I can think of is that Arial Unicode MS font isn't on your PC for whatever reason.
Are you able to create a new project for ADV7625, drop an OSDLabel and then click the ... button next to the fonrt to bring up a list of fonts? Can you check for Aria Unicode MS? Will it build your sample with one OSDLabel?
Alternatively-- you can check your Fonts control panel to see if the font "Arial Unicode MS Regular" is present. If it's not, that's probably why it's not working on your system.
Dave