It gets blocked by GateKeeper:
無法打開「Steinberg Download Assistant Setup」，因為Apple無法檢查是否包含惡意軟體。
此軟體需要更新。請聯絡開發者以瞭解更多資訊。
Translation:
Unable to open “Steinberg Download Assistant Setup” due to Apple’s inability of detecting whether it has malicious contents.
This app needs update. Contact its developer for more intelligence.
