If your GPSport 260 device is using firmware version V2.02, you can’t downgrade your device to an earlier firmware V1.03.
It is because Holux did some hardware modification to protect their product. Therefore the new firmware structure is different from the previous version.
If your device is using firmware version V2.02 in default, it means the hardware of your device is the newer one.
The identify method is :
When you follow the firmware updating instruction, you see the Main_FW displayed “Ver. 1.00 or 1.01”, you can update the old FW_1.02 to 2.01 version.
If the Main_FW displayed “Ver. 1.02” as below, you can not update the old FW_1.02 to 2.01.