05-10-2016 08:15 AM - edited 05-10-2016 08:17 AM
you do not open the FW on the computer. Just download the file and copy it to the root directory of the WMD. Next time you turn on the WMD the FW update process will begin. You can also go to settings and start the FW upgrade from there if it is not automatically launched.
detailed instructions are below