From the March 10th update:

 

 

PC Monitor Windows Agent and Android app updated to version 3.7

- XenServer module
- SSL Certificates
- Web Sites monitoring

 

What does "SSL Certificates" refer to?   

 

My dream would be a warning say 30 days before an SSL is due to expire.  Now that would be nice.  I suspect it's not that, but if it was.... how do I set it?

That is exactly what it does

 

There's a notification option in the PC Monitor Manager for this and you will get an alert with X days before the certificate is due to expire.

Check the Notifications -> Web tab in the Manager.

 

Awesome stuff, many thanks!