Update:
To take the filesystemshield.ini totally out of the equation, I disabled the self-defence module, stopped the file system shield and deleted the filesystemshield.ini file. Restarting the file system shield recreates the filesystemshield.ini.
So now it is very basic, on, see image1 and it continues to chomp away like pacman scanning files 813, since starting the FSS, but that appears to be a somewhat slower than before.