Hey - I don't know if you are in the US or not, but can you try giving the tech support folks a call on this?
They have been pretty helpful to me on things like this.
You may also submit a bug ticket to them - think that would take longer to get a response, though.
I seem to remember some folks having some error messages popping up during expansion pack install for Dim Pro, but I thought that they fired up Dim Pro anyways and seemed to have found the expansion pack like it was supposed to be. Don't know the specifics, and don't know if it is the same sort of thing you have trouble with.
Doubt it would help, but maybe worth downloading the expansion pack and installing? Or perhaps re-installing Dim Pro and then trying the expansion pack again? Just grasping here, but no tech support until Monday so I thought it maybe worth a try.
Hope this gets resolved for you,
Bob Bone