No, I followed all the instructions, finnaly with this steps is fine now!!!
( this step is from robbieb61 topic from this forum)
Turn it off, turn it back on while holding down buttons 6 and 12 (the last buttons on the top and bottom rows). That took me into "Update Mode" ,(the screen was black???)
Change the usb cable, it seems problematic ! but now line 6 update shows me my Helix,(Chad Boston Youtube Channel advice)
Download the firmware to local update, first downgrade to HELIX_FLOOR_1_06_5_bundle version, then update Helix_FLOOR_v2_21_0_bundle, now in working again with the last version!!!
As I said again , I follow all the steps, I Think the problem was the usb cable!! t
Too bad the unit comes with such a cable!!!!