So in fact you do, then, Tim?
I do... uh.. is there a ring involved?
I think I tried 3.04 to 4.0 and it didn't work. Updated to 3.12 and didn't wait to try the desk and went to 4.01. Failed. Loaded 3.11 and it was successful, loaded 4.01 and was successful. After all that I read a report from another user who'd updated to 3.12 with similar results when trying 4.01.
Behringer may have fixed whatever caused the the update to fail if coming in from too low, or too high.