Our Classic interface is our former visual user interface that was used from 2014 until 2019.
In 2019, we replaced it with our current interface, which offers new features and improved accessibility for mobile and tablet devices. The classic interface was still available for all users, as that allowed you to slowly get used to the new interface.
Please note that our Classic interface soon will be phased out completely by the end of the year 2021.
If you find there is a specific feature you require, please contact our Support team via firstname.lastname@example.org, so we can help you further.