Failed update?

Hi hughva, & welcome. Please refer to this topic, specifically the 2nd post, & see if that doesn’t help.
http://ww.wp.xz.cn/support/topic/wordpress-40-master-list?replies=5

If it does, we’d very much appreciate it if you’d mark the topic as resolved. If not, of course, please don’t hesitate to request further assistance.

I upgraded to 4.0 and had to downgrade recently. I explained my process here (but don’t hate me if you screw up your site). Just know that my process worked for me, and I now run WP 3.9.2 and everything is ok

http://ww.wp.xz.cn/support/topic/how-to-downgrade-from-wp-40?replies=4