The script may state the firmware has been flashed, but if you received a note saying no device was present then it may not have performed the firmware update at all (the script could admittedly be more informative when that happens).
The current firmware is version 1.1, which should be stated at the start of the log window. To be safe you may want to flash it again, it's safe.
Here's an outline of the procedure required:
- run the update script
an informational warning will be displayed on screen - it may ask you for your admin password
(if you haven't ran a command with sudo in a little while) - it will pause, waiting for you to unplug the dock from the computer
- once you are ready, plug the dock back in and press any key within a few seconds of doing so
- you should see the flashing in progress for 1-2 seconds
Essentially you need the catch the device when it is initializing, when the lights are flashing on and off. Once they are steady it is too late and dfu-programmer will state 'no device present'.