I have a used Helix that is less than 11 months old from purchase at Sweetwater. I downloaded the 3.50 helix firmware and the HX Edit from Line 6 ane ran them from I connected my Helix to a MacBook Pro yesterday using the OEM cable and a USB-C hub. No connection at first, then i flipped over the USB-C connection at the MacBook and voila! All connected and was well. I backup up all the previous owners paid patches to the Mac, flawlessly ran the 3.5 update, did a "button 9 and 10" factory reset and was able to play. However, within minutes after this update the Mac started loosing connection with the Helix, intermittant at first but now it will not connect, no matter if i try two different USB cables, different ports on the HUB, different ports on the MAC, different USB cables on a Windowws 10 laptop. Nothing. It says a USB device is connected in device manager on the Win10 laptop, but it's "unrecognized" and shows no connection whatsoever in HX Edit. Both the Mac and Win10 versions of HX Edit are the most up to date version available directly from Line6 website. I've factory reset the device 3 times this morning and tried everything i can think of and checked everything i can. USB Port feels very firmly attached, no sign of damage, and the same cable i used with flawless connection during the 3.5 firmware upgrade does nothing. I appreciate any help you can offer. Thanks! -Chris