Thanks Giomen and aekhong, I have just downgraded to 4.80 and used the GUPDATE.GCD that I made from the RGN_Tool (at the same time I made the RGN file itself) it upgraded and I can see 3D buildings now.

I looked at my 13.10 map pack and I can't find a gmapdem file, I assume that there isn't one for NA and all you get is 3d buildings and not terrain?

Thank you both again!!