If you install/uninstall the audio driver software to/from your PC (Windows), the Setting Utility will also be installed/uninstalled.
How to install
Download the latest driver software from [here].
Be sure to close all DJ applications, disconnect the OPUS-QUAD from your computer, and then install the driver software.
For details, see [Obtaining the driver software] in the Instruction Manual.
How to uninstall
■ Windows
1. Open Control Panel > [Programs and Features]
(Or open [Settings] > [Apps]).
2. Select the [OPUS-QUAD Driver] software and uninstall it.
3. Follow the on-screen instructions.
You can read the Instruction Manual [here].