Close all windows of HarmanAudioworx applications.
Open Windows Control Panel > Programs > Uninstall a Program and look for HarmanAudioworX.

Select HarmanAudioworX and click on Uninstall.
An uninstalling confirmation dialog will be displayed.

Click Yes.
The user account control dialog will be displayed.

Click Yes.
A removal confirmation dialog will be displayed.

Click Yes to remove all application data which includes file, folders, registries and the associated database.
Click No to abort the uninstallation.
If a HarmanAudioworX application process is still running: The error message dialog below will be displayed.

Close the HarmanAudioworx application (or process) and click Retry.
If Retry fails to work, other application related processes might be running. Close whichever process is listed and click Retry again.