I'd not been able to get 3D working on my Win 7 Ultimate.
However - I simply cannot fault the support I've received from Dallan Porter in the USA on support. He has spent ages getting me going and went way beyond what any other company ever has with a fault.
I'm now working in 3D.
2 things -
Thanks Dallan
To anyone else with any Airnav issues - use the support emails system - aside from the time difference - it simply is second to none.