I am having the same issues. Downloaded your example, same problem. Anytime I add any control I get the same error. Tried 4.0, 4.5, and 4.5.1 assemblies that I downloaded yesterday. Followed your getting started guide (You really should make that easier to find... seriously)
I have spent the whole day just trying to add a simple control to get started. Very disappointing to say the least. Only 28 days left in the evaluation. You should make your evals 60 or 90 days because it seems it will take a week to even get it started.
Any suggstions to get this going?