Change label Gallons to Litres?

[Bestgear]

Hi Folks

I am struggling to find out how to change the label from gallons to litres for the water meter I have installed.

I appreciate I can (and have) changed the calibration so it at least reads correctly, but would like the graph to be in litres....

I was looking for something in mcstemperature.ini like a MetricWater=true which I hoped would be the way to go.

Any help is much appreciated!

DJ