If the red LED stays on its possible the mic has become disconnected from the app during recording.
When this happens, quit and re-launch the Audigo app and wait a few seconds, the app should reconnect to the active recording session. Then stop the recording from the app and either save or delete the recording.
If relaunching the app doesn't resolve the issue and you want to end the recording, you can press and hold the button on the front of the mic until it turns off.