How are the notes determined at the Hohner Tuning Designer?

The European scoring and naming convention of musical notes does not seem logical and is almost impossible to represent on a computer.
Therefore, at Hohner we're using the American notation system.
The following picture shows the situation of the notes on the piano keyboard.
Using the American system shown in the first line, the green line shows the range in which harmonica reeds are usually made (except for bass harmonicas which can be even lower).

Notationsregeln im Hohner Harmonica Tuning Designer