You may have tried switching your playback device (output) in Windows and noticed that it always reverts back to FxSound Speakers when our software is running. Switching your playback device in Windows will actually swap to that device, but it must pass through our app so that we can process the audio on your device.
For more help with switching your playback device, check out this help article.
Now that FxSound is free and we've moved to a donation model we've had to discontinue active customer support, but you can get help from the community at the new FxSound Forum.