Increase number of GUI scale values
Another conclusion from debugging the biased electrode issue was that the range of scale values (upto 10 mV) is too small.
Very simple to extend:
In GUI_Manger change line 76 to:
private float[] vertScaleFactor = {1.0f, 2.0f, 5.0f, 50.0f, 500.0f, 0.25f, 0.5f};
to add 100 mV value (that's the 500.0f entry).