I have two major updates to share.
A Pro version of "KC Tools WP" has been created. It adds an SQL tab that can upload and execute SQL files against the database. A similar feature is already available in "KC Tools PHP". More WordPress-specific features are planned, although ongoing problems with my fork function make the timetable uncertain.
The second update concerns "KC Tools PHP": its prices have been reduced by 90%. This was how I chose to celebrate my birthday. I hope the lower price helps more people use the tool effectively.