For other upgrades, please email us. I bought a pack from you with all the applets you then had. Now you have more applets. If any of the applets in it have been upgraded, you will get the latest versions. If new applets have been added, these will also be in the new pack sent to you.
People often move websites from one host to another.
Companies with their own servers also not infrequently undergo IP renumbering. Normally the website is licenced under its name. But once the name has propagated to the new IP, you can use the name again and then the applet will work. If you urgently need the applet to work while accessing it via an as yet unlicenced IP, you will need an appropriate licence. You only need to do something if the URL of your website has changed as well.