You have to download a software update manually when option [업데이트 자동 다운로드] is disabled. When a software update is available on the remote server of your service organisation:
The button [업데이트 다운로드] becomes enabled.
A message appears in the main dialogue of Remote Service.
Click button [업데이트 다운로드].
The software update is downloaded to the path defined in dialogue [다운로드 설정]. You have to install the software update always manually.