the initial patch download incorrectly had the instruction to update the files in the webassist/kfm/configuration.php folder. This was a typo when writing the initial instruction, it has since been updated in the download center to say that the files should go in the HTMLEditor/editor/plugins/kfm folder.
the correct location to place the updated file in is the HTMLEditor/editor/plugins/kfm folder.
if you re-download the known issue files, it should give the correct instructions.