Kevin,
I just tried Eugenio Casal's suggestion of reregistering the DLLs with GACUtil.exe and it solved the problem. However, I am still getting the error mentioned in my previous reply to you when I try to create a new MM C# Windows App project, getting the message:

The following exception has occurred:

MissingMethodException: Method not found: Void
OakLeaf.MM.Main.Automation.VisualStudio.mmVSSolution.SetApplicationNameProperty(EnvDTE._DTE, System.String).

Thanks again for you help.

-Steve Lundahl