Getting help with running Fxsound

Hi Sam, welcome to the forum.

When did you download the program, from what source, and which version?
Installing the latest version - currently v1.1.22.0 - is always recommended.

Besides a regular Control Panel uninstall, you can also remove the driver from Device Manager manually if necessary; the instructions on that are linked here.

The solution offered by @bvijay under the fourth category of the issue linked below also seems worth a try: