Implementing update dialog and persistent state of component

I want to use this similar dialog for my plugin. What is it called and how to bind it with the main plugin? 
Additionally, I want to keep my current product version in a persistent component file. I have other persistent components in the settings dialog and saving it to the XML file. But, now I want to update the current version after when a user clicks an update button of the above dialogue and updates the value in the same XML file.