We highly recommend re-building your existing extensions on our new site: WEB.miniextensions.com
Creating and duplicating an extension in the legacy website is no longer allowed. We also stopped maintaining the extensions in the legacy website. Despite this, the old extensions will continue to work just like before. We have no plans to turn them off. You can still access your old extensions using our legacy site: APP.miniextensions.com
Unfortunately, it is not possible to auto-migrate the legacy extensions to our new site.