I installed the WPF examples but they are unusable. You have to spend hours to get them work.
You have to scroll thought a solution with 50+ projects, they are compiled with v4.0 but supportedRuntime is set to 2.0, there are Projects with incorrect StartupUri, …
Are you testing the Demos with your Test Studio solution?
I think if you want to sell something, you have to provide a minimum of quality especially for the product demo.
It’s all the same with third party components, you have to life with their quality and spend a lot of time for searching bugs and building workarounds.