For backups of repositories that still exist in your GitHub account (active backups):
Simply install the BackHub app, allow access to all repositories you want to backup, and a new backup will be created automatically.
For backups of repositories that no longer exist in your GitHub account (archived backups):
These backups do not migrate automatically. We are notified for every customer who is migrating from BackHub basic to the newer BackHub on GitHub Marketplace, and are transfering archived backups manually. This will take a few days. Once we are done with the migration, you will be notified.
Note: Backhub basic will be removed as of June 30th, 2019.