Thanks for sharing your project with us in an email.
We have fixed up your project please try this out locally and let me know how you get on:
Here is fixed project for .NET Viewer:
It looks like you didn't add the reference to the Viewer DLL. We added the ref, and compiled the project with copying the libs to the bin (local option). So the project should start now and work without updates.
Please let me know if you have any other issues and we'll be glad to help?
Derek Hyland, Venture Lead, GroupDocs (Aspose Pty Ltd)
Office: +1 (214) 329 9760