To update the license key, launch the application (
) and go to to bring up the License window.
You may click the Import License File... and select the license file, or Paste License Text... to copy-and-paste the license file's content. When finished, the license information will appear in the window. Verify that it is correct and click Close.

Lastly, if you are using the Node API, you must reload the asperanoded service.
> asnodeadmin.exe --reload