"If the contents of the book with edits included is desired, disable the KPF Extract file type plugin to import KPF files unchanged for conversion by this plugin."
So... I am dealing with a problem to convert KPF files to mobi, because calibre DOESN'T recognize it as a KPF file, but as a DOCX instead. So how can I disable this KPF extract mentioned? I really need to fix this problem.