title: MSI upgrade with Powershell /DSC
body: <p>I am able to successfully uninstall (Ensure = "Absent") or install a product (Ensure = "Present"). However, if I create a new version of the same product, it always comes back with the same message - "already installed". </p>
  
  <p>Does that mean the only way to upgrade is to uninstall / install?</p>