Command Line doesn't work

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I have installed several versions of FxSound (currently on beta 1.2.9.0) but I cannot make use of the command line options.

This is the output of the fxdiag.exe:

Audio Playback Devices

  1. Realtek Digital Output (Realtek(R) Audio) [SPDIF] {0.0.0.00000000}.{258b8e86-143f-4b77-88af-20c0a09a27e0}
    [Active] [2 - Channels] [32 bit, 48000 Hz] [Volume: 22%]

  2. FxSound Speakers (FxSound Audio Enhancer) [Speakers] {0.0.0.00000000}.{49396f23-55a8-4dfd-8859-95a8df0d391c}
    [Active] [2 - Channels] [32 bit, 48000 Hz] [Volume: 28%]

  3. Kopfh÷rer (USB Audio Interface) [Headset] {0.0.0.00000000}.{54ce48f3-b55d-42f2-8af6-1a3fe9d4c8fb}
    [Active] [2 - Channels] [32 bit, 48000 Hz] [Volume: 28%]

  4. Dell AW3423DW (NVIDIA High Definition Audio) [DisplayAudio] {0.0.0.00000000}.{5a43b66e-46be-4513-83d0-722c556904e0}
    [Active] [2 - Channels] [32 bit, 48000 Hz] [Volume: 100%]

If I run "C:\Program Files\FxSound LLC\FxSound>FxSound.exe --output=“Dell AW3423DW (NVIDIA High Definition Audio)” it doesn’t switch the output to the Dell device.

If I use this Powershell script it also doesn’t change the output:

$fxSoundPath = “C:\Program Files\FxSound LLC\FxSound\FxSound.exe”

if (Test-Path $fxSoundPath) {
    $fxArgs = '--output="Dell AW3423DW (NVIDIA High Definition Audio)" --preset="General"'
    # Vollständige Entkopplung des Prozesses von PowerShell
    Start-Process -FilePath "cmd.exe" -ArgumentList "/c start `"`" `"$fxSoundPath`" $fxArgs" -WindowStyle Hidden
}

There is also no option for the preferred device anymore. How can I make it work?