Ruben,
Yes. Many thanks! You were correct - I overwrote config.inc.php and everything else in /includes without thinking (even as I had the instructions before me). It really underscores the need to backup before you start the upgrade. Files restored. All is functioning now as it was before.
[I was at 7.5.6 and intended to upgrade to 7.5.6p2.]
Looking forward to 7.6!!
Jake
