What is the function of the Reset button available through the pin hole on the bottom of an xDirect?

You can use the Reset button to set an xDirect to factory defaults.

Use an un-bent paperclip or something similar to depress the Reset button for about 10 seconds as you apply power to the xDirect. I.e. depress the button, apply power then keep the button depressed for at least 10 seconds.

When the xDirect finishes booting it will be set to factory defaults.