Not having much luck with Line 6 products lately.
Just got a HX Effects, which was running 3.11, perfectly, no issues at all.
Decided to update to 3.15 because it looks good. Fails every time.
Got a tiny way through using Line 6 Updater, then says there's an error. Now it won't boot, unless I hold down '>' then release, but that's for trying the update again, which will just fail again.
Not sure what the problem is. It's USB 2.0, PC sleep settings are all off, no other audio apps are running, etc.