There is also no response from the digi device discovery software. Im’ very sure that it’s working well before the upgrade of firmware. At this moment, the LEDs flash in a very special way.
You may have inadvertently uploaded the wrong firmware to the device (V1 vs. V2), or the upload may have been corrupted. Using FlashWriter to upload a know good (flashwriter) firmware file would likely be your next step to recover.
-XBNB