Downgrading
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UPGRADE / DOWNGRADE INSTRUCTIONS
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copy all wdtvlive.* files (ver, bin, & fff if available) to usb key formated to FAT/FAT32 (under linux mkfs.vfat)
dont use NFTS its better to use better supported well known FS like FAT
Vista is using exFAT also PE2USB is able format USBkey to FAT16/FAT32
if is not recognized new firmware change VERSION to higher release
------wdtvlive.ver------ VERSION='1.02.21.WDLXTV_LIVE-0.4.2.0' LOCATION='wdtvlive.bin'
You must change the version number in quotes to exactly what is shown below. The whole part between quotes. Changing it to just 1.20.04 (or similar) will not work because WDLXTV must think it is upgrading to a new version of WDLXTV firmware, or it will not see the firmware as new and not prompt you to upgrade. After you accept the upgrade, it reboots and it processes, then your WDTV will report the stock firmware version (such as 1.06.42 for the WDTV Live Plus HD).
VERSION='1.20.04.WDLXTV_LIVE-0.4.2.0' LOCATION='wdtvlive.bin'
You may also have to clear your /conf
rm /conf/* ; config_tool -s; config_tool -s; reboot
Referneces;