Once you purchase an AnyDesk license, you must register it in the AnyDesk Client to unlock all licensed features.
You can do this by signing in to the AnyDesk client with your AnyDesk account, which registers the license automatically, or by copying the Clé de licence from my.anydesk and pasting it into AnyDesk > upper-right menu > Change License Key > Register license key.
On Windows with AnyDesk 9.0.0 or later, you can also register the license directly from my.anydesk II.
🦉 For more details, see this article.