The source code for the Int-N PLL evaluation boards' control software is attached below.
Warning: You use this at your own risk and it is not officially support by Analog Devices.
The code is written in C# and the project opens in Microsoft Visual Studio. You can get a free version of Microsoft Visual C# 2010 Express here: http://www.microsoft.com/visualstudio/eng/downloads#d-2010-express
For the USB microcontroller firmware, go here: http://ez.analog.com/message/52311#52311
Post any questions below.