Sorry, after some severe and personal matters delaying things I have just gotten back to developing this addon. During that period I let quite a few things slide and it would seem my subscription with the e-store hosting this has expired. A new and self-hosted platform will be up when the next version is released, which should also come with some requested features (quote fixes, Widget Framework compatibility, etc.) along with a couple of other things.
Currently it just hides the label when a slice is too small, although the threshold depends on how much space is available for the chart - you should be able to easily make it larger with some CSS edits.