if you google "rollback live plus", there is a wdc help page which has a link to the rollback firmware which is Firmware Ver. 1.06.16_B.
You basically copy the three files to the root of a USB key, plug it in, and you will get the "New Firmware Found" message.
The version will actually say it is 2.xxx but it is really 1.xxx once it is installed.
After that, you just need to do the same thing with the 1.06.34 firmware.
The link on download.wdc.com doesn't seem to work anymore.
The filename was wdtvliveplus_1.06.34_B.zip. Maybe you can find it somewhere else.