Does avast home alert you that your license key will expire a few days before it expires.
It was only a week ago wasn`t it you asked the very same question?
http://forum.avast.com/index.php?topic=16996.0
Aside from the fact you have asked this before. Even if you didn’t get a warning, you can check the about avast! and see the expiry date, if you don’t check that then when the updates expire you will notice because VPS updates would fail.
So there should be no problem knowing if the VPS updates have expired.