When Ruggie is connected to your computer, the LED display will flash "USb" to indicate it is connected.
We've had reports on rare occasions where the USb flashing screen gets stuck, even when disconnected. This is usally on a certain combination of Mac computers and their OS.
If this occurs, please report to our support team, and try advanced settings on a different Mac or a PC. We're coming up with a solution with our developers to fix this as we write this, it should be fixed soon! Sorry for the inconvenience.