Hi,
That is very strange. How are you running both TF basic and Pro on the same computer? I can't account for such a difference in map downloading. I was still going to guess firewall permissions (allowed for one TopoFusion.exe and not the other) but if you are installing/switching between Pro and Basic it should be the same exectuable in the same place.
So... unfortunately I am not sure what to suggest. I can confirm that TF Pro is downloading maps, topo, aerial, myTopo etc, at least from my machine.
Anyone else having this problem?