HMI with LPC1788 mcu and .nxm file

Hello there,
There is one chinese hmi unofficial which has LPC1788 mcu and has firmware file .nxm extension. any one has any idea which software I should use to open .nxm file or the board has 2 flash memories . how can I read the momory? the hmi has usb and rs232 port.

It would have been useful to post a link to the product you are referring to?