title: Unable to run Excel VSTO Add-ins
body: <p>Trying to run an Excel 2013 VSTO Add-ins project, and I keep on getting an error that says that:  </p>
  
  <blockquote>
    <p>"System.Security.SecurityException: The solution cannot be installed because it is signed by a publisher whom you have not yet chosen to trust. If you trust the publisher, add the certificate to the Trusted Publisher list." </p>
  </blockquote>
  
  <p>The project has a key file with signature algorithm sha256RSA and certificate issued to/by the Windows User. </p>
  
  <p>Any idea how to get around this ?</p>