Hi there NLY100313,
Check out this thread. Just updated my UP2Stream HD today and it is now dead!!!!! - #27 by MartinD
You are sadly, not the first to be there.
Not sure why the update hasn’t been pulled as this happened to me a few week ago.
I now have my replacement board as there does not seem to be any way of re-booting it.
They new board says an update is available…think I will stay away from that for now.
Sounds like deja vu all over again 
Martin.