I have found the solution on this thread:
Noting the solution here since it is "hidden" in the above discussion. The 64-bit installer is available at:
Once you extract this, and run the .exe, there is a Dpinst_amd64.exe within that takes care of setting up the drivers... At that point, you can plug in the EVB and you are good to go.
However, it would be nice if Broadcom could include the 64-bit installer as part of the SDK so that others do not run into this issue in the future...mifo