the latest FW versions are


RTU: 8134CAA_PRG_2001_V02.00.02

APP: 8123AAB_PRG_2001_V02.00.00


The FW upgrade of an FTD to these FW versions will only be possible from the following versions 

RTU_V01.03.00

APP_V01.00.07

Contact Support before attempting any FW upgrade on your FTD