First off, apologies for any issues with installing FxSound! We've got a few troubleshooting steps that we hope will help.
The following instructions are for Windows 10. Please note that Windows frequently updates their software, so this could become out of date!
2) Right click the sound icon on your taskbar
3) Open Sound Settings
4) Click Manage sound devices
5) If DFX Speakers is a disabled sound device, click and enable it. If not, contact us here.
6) Once DFX Speakers is enabled again, reinstall FxSound.
If you're still having issues, please submit a request and we will get back to you as soon as we can!