I had the same problem as you before and I was shocked to see my TS Pro II with Live features and pressing on the Display button shows that it is a Terastation Live model. So using tftp boot, i manged to boot it on a TS Pro II firmware and voila! it went back to a TS Pro II and thank God, as always, my 1.6tb of data was still there and readable. However on another case, it was not successful. The data in it were gone but fortunately, the data was not important and I all i did was to delete all the partitions in all four hard drives and then proceed to tftpboot into the TS Pro II with the new firmware. Best bet is to backup whatever data you can see in the "Terastation Live" then proceed to TFTP it with the TS Pro II firmware.