Reply To: version 4 firmwareBy IDeangelis / Home › Forums › Products › Rackmount › version 4 firmware › Reply To: version 4 firmware March 11, 2010 at 3:06 pm #120129 IDeangelisMember Hi paulcongratulations on your new Eventide!Go ahead and update it. You won't loose any factory preset from the previous OS…and gain many new ones.bestItalo