Keep your receipt link. In fact you should bookmark it in your favorite browser for safe-keeping. You should be able to revisit anytime and download the latest or even a previous version of your choosing. Also, email updates are coming soon that will let you know when a new version is released. We’re also going to be implementing auto updates at some point.
In the meantime you can check back on the changelog every now and then:
And when the time comes to upgrade: