The first is to use DNS Manager and manually change your IP by logging into your account, and selecting "DNS Manager" from the right side menu. From there, find the domain you wish to update, click on the record, change the IP, and save your changes.
Many routers have built in Dynamic DNS abilities, and the manufacturer of your router should have instructions for how to set this up.
Windows devices can use our own updating software Homing Beacon, available here:
We offer 2 downloads for Linux users, a Client and a script, and they are avaialable here:
Do It Yourself
The information you will need that is specific to ChangeIP can be found in our DDNS API article here: