title: How do I renew my expired Windows Store app certificate?
body: <p>I have taken over the development of a Windows Store app, and our store certificate has recently expired. How do I renew the certificate, or do I have to generate a new one?</p>
  
  <p>In the .appxmanifest, I can choose to generate a new Test certificate, but I need a <em>store</em> certificate, not a test certificate.</p>