How to make encrypted updates to the scripts and database to a remote hosting user?

Good afternoon. Is the idea of service. The logic is: the user downloads a script (say cms) installs on my hosting and use it. After some time an update of this script from the Creator. Is it possible to start an update of the website user without interaction by the user or with minimal (clicked, it all refreshed)? + is it possible to do file encryption script that would we could use only those who pay?