PS
Update of 4.5.3 to 4.6 using Dashboard fails with the “PHP Fatal error: Maximum execution time of 30 seconds exceeded in “wp-admin\includes\class-wp-filesystem-direct.php on line 79” message.
PPS
Increased max execution time in php.ini and could update 4.5.3 to 4.6 using the dashboard. However, it is unclear why there was a problem with the new installation of 4.6.