After purchase, you must register the license in the AnyDesk 클라이언트.
You can do that either by signing in, which automatically registers the license, or by copying the 라이센스 키 from my.any데스크 and pasting it into AnyDesk > Change License Key > Register license key.
On Windows with AnyDesk 9.0.0 or later, you can also register directly from my.anydesk II.