Change the com port setting from com3 to a higher number. Not sure how you do this for your device as I don't have the earthmate, but I think this will probably work. On my system, this is done via the driver properties in device manager. Once you've done that, use the map monkey configuration to set it to the new port number you've chosen. The point of raising it to a higher number is to ensure there are no clashes with other devices. As an example, I moved mine to com9.