New Release - My Book Live Firmware Version 02.43.03 – 022 (10/8/2013​)

Just tried this latest version of the My book live update and am sorry to have to report that it is stuck at 90% complete.

Upgrading from 02.41.05.034 to 02.43.03.022.  What do I do to stop the failed upgrade and get back to a working NAS?