Object reference not set to an instance of an object

NullReferenceException
  Object reference not set to an instance of an object.

Source     : MicroFour StrataFrame AddIns

Stack Trace:
   at MicroFour.StrataFrame.AddIns.PartialClassBuilderDialog.SearchWithinFolder(Project Folder)

Other messages

Exception of type "System.ComponentModel.Design.ExceptionCollection" was thrown.

I re-installed the Starta Frame with the same results.

Please Help.