You were correct, Nahimic did not uninstall and stop as a service. It has been properly disabled and barred from ever functioning again. After a reboot, this appears to have fixed the glitches and graphical errors. Thanks!
The framerate inside the app did improve, it seems like a consistent 60fps, however it still isn't running at the expected 120fps like the rest of my Windows desktop. Does the LaunchBox interface only run at 60 or is there a setting/method to up the framerate?
Again, thanks for the reminder to make sure Nahimic was properly disabled.