7.1 slider wont enable

I was using the 7.1 surround sound software up until today. I noticed the sound was different. I opened the 7.1 app and noticed the the slider for enable surround sound was in the off position and grayed out. I can no longer slide it on. I have uninstalled and reinstalled the app and that didn't work. I have uploaded a screenshot of the issue. Any help is appreciated.