Sorry for the false alarm... I figured out a solution!
I used the Line 6 Updater, but I had to force it to install because Big Sur said "it couldn't scan for malicious content". After forcing the software in, I reboot the Helix with foot switches 6 & 12. (Force Reboot, I think. It's the one that gives nothing but a blank screen)
Then Updater could do its thing!
Back up and running. (HX Edit is now working better too)
I hope this helps someone else at some point...
Have a great day!