If you want to re-customize your avatar, the first thing you will need to do is to delete the previous version. To do so, you will have to open the Home Screen of Wayports and click on 'User attributes'.
After that, you will have to click: first on 'User-editable attributes' (1), then click on the small cross on your right (2), and after that click on 'Save' (3). Once you have deleted that line, you will click on 'Back to Main Menu' (4).
Back on the main menu, you will click on 'Enter Wayports'.
Automatically after that, you will get the avatar creation dialogue and you can customize a new avatar from scratch following the steps in this article.