You adapt the social media or other icons for your project in Skins.
Open the project where you want to change the url or other settings. Go to Style > Icons and click at Examples and Adapt account settings. The icons from account settings get imported and you can make your changes.
You are only changing the icons and their settings in this project.
Note that you might need to change the values for Icon Margin Left/Right, Icon Margin Top/Bottom and Table Width since they don't get updated automatically.