Hi diskdaddy,
If you're a premium customer, then please can you use the support facilities at updraftplus.com - the wordpress.org rules don't allow their forums to be used for support of paid products.
Having said that (since this may be useful to free users too), almost certainly the problem is caused by the completely wrong clock on that server:
0000.006 (0) Opened log file at time: Wed, 12 Mar 2014 13:06:39 +0000 on http://www.xxxxxxx.com
The problem is that the lock won't expire until 3 minutes after then! (Presumably the database server has the right time, which is why it doesn't think that time has yet arrived).
You'll need to a) reset the clock and b) go into the WordPress database (e.g. using phpMyAdmin) to remove the following database keys (where they exist):
updraftplus_last_lock_time_
updraftplus_last_lock_time_d
updraftplus_last_lock_time_f
updraftplus_last_lock_time_fd
updraftplus_unlocked_
updraftplus_unlocked_d
updraftplus_unlocked_f
updraftplus_unlocked_fd
Best wishes,
David