Hi Riky, welcome.
FxSound setting itself as the Default Device, is the normal expected behavior.
Have you tried setting your active audio device as the Default Communication Device?
And have you read the main troubleshooting list at the top of the forum yet?
Also, instead of uninstalling, you could simply disable the FxSound Speakers device found in Windows Sound Settings as long as necessary, without any harmful effects, except for the “Oops!” pop-up, which you can safely ignore in this case.
Let me know if this helps (or not).