Here are some recovery steps if the update fails when using HX Edit, or Line 6 Central on your system.
Make sure your laptop is connected to power, or be sure to check your USB cable connections. If you're on a desktop system, we recommend connecting to the rear USB ports near the power source.
1) Download and install the latest version of HX Edit BEFORE you run the update. This installation will also include the latest drivers. If you're on a Windows computer, it may be helpful to restart after the installation. https://line6.com/software/
2) Put your Helix into update mode, by pressing and holding buttons 6 and 12 while you power on the Helix.
For the HX Stomp, press and hold down the RIGHT page button while power on the device. (You may get a blank screen that is white, or black - this is normal for the HX Stomp)
3) Use Line 6 Central (NOT HX Edit) to run the latest firmware update again. Make sure only the Line 6 Central is running during the update, close all other recording applications.
(If the Helix is in update mode, it should show up on the screen as a device after Line 6 Central is open after you sign-in. If the Helix doesn’t appear, try re-booting the Helix normally, you should also try different USB ports on your Mac or PC).