The Apogee Firmware Updater application For Duet 2 and Duet for iOS & Mac  assigns a numerical value to each Duet 2 connected to the Mac. I you have only a single Duet 2 connected it assigns the number 1 to it, so you see Duet 1 in the Device Select drop down menu. If you had 3 Duet 2 units connected to the same Mac you would see Duet 1, Duet 2, Duet 3 in the Device Select drop down Menu. We realize this is confusing and plan to change this to be clearer in a future update. For now just go ahead and Update it will be for the Duet 2 not the old Duet 1 Firewire version.