A little confused here. I installed the plug-in and selected some books and chose 'Generate from selected book' - then got a dialog asking where to save the .apnx file(s). This is puzzling to me because I expected the output to automatically be placed in the directory within my Calibre Library that contains the book and meta-data. Surely I don't have to generate the .apnx files one at a time and navigate to the book's directory to show the plug-in where to leave the output?
Plug-in seems like a good idea but I'm confused about how to use it.