HX711 ADC Node or Arduino Serial In Help

Well in your initial screen shot I can see two tabs that are the Arduino IDE running. so I would guess that had grabbed it in the first place… both need to be closed.

If you were using the Arduino nodes you may need to remove some old config nodes - under menu (top right three bars) - Configuration nodes - select unused. If there are any then double click each - then top left button - delete) - redeploy.

Look at the range node that can rescale a range of numbers for you.