EnableUpgrades.wxi

<?xml version="1.0" encoding="utf-8"?>
<Include>

  <Property Id="PREVIOUSVERSIONSINSTALLED" Secure="yes"/>

  <!-- Upgrade WiX installations -->
  <MajorUpgrade
    Schedule="afterInstallInitialize"
    DowngradeErrorMessage="A later version of [ProductName] is already installed. Setup will now exit."
    AllowSameVersionUpgrades="yes"/>

</Include>