The native Windows client keeps your hostname pointed at your PC's public IP automatically — a tray app with a status icon plus an optional background service that updates even when nobody is logged in.
tray icon → Settings
The API key is a dyndns_… key from the dashboard — account passwords are rejected by the server. The service keeps itself updated automatically; the tray app shows the status and last IP.
Create a free DNS Beacon account, add a hostname and generate an API key — then come back and finish the setup above.
Create free account