I encountered a problem  while create a new GH component with GH add-on by using Visual Studio 2010. I installed Wizard assembly from website,and it shows under toolbar of VS  tools>extension Manager. I got an error,( please see attached the screen shot.) so the new project with add-on cannot open at all. 

"system.Argument null exception:Value cannot be null

Parameter name:path1

at system.IO.Path.Combine(String path1, String path 2)

at GH wizard.UserInputForm..ctor(Dictionary2 repmacements)"

at GHWizard.CollectInformationWizard.RunStarted(object auotmationObject)

Dictionary 2 replacementsDictionary,WizardRunKind run Kind, Objevt[]

customParams)"

I am using R5 evaluation with latest grasshopper version.

Any idea what went wrong ?

Thank you for your time,