Too bad. Other software I've used for other tasks can auto-import but avoid importing the same files more than once. Which would be useful for people like me who want "copies" because we do sometimes use the Kindle app or otherwise want to use the files for other purposes. Seems like it COULD be a USEFUL OPTION to "watch" a directory but only import files once for PEOPLE who like to DO THINGS in different WAYS.
Point being that, while I use Calibre to manage my library and for many purposes, I still sometimes use the Kindle app on my computer so I can't take advantage of the auto-adding goodness
Similarly, it would be useful to be able to specify which library auto-imports went into or, at least be able to tag such auto-imported files in the main library if there's no choice.