It has 2 flavours: single band and multi-band. Each version has mono and stereo components so we are talking of a total of 4 plugins!
Originally made in 2009 as an exclusive plugin for a customer, it was rescued in the beginning of this year as it was no longer used as he switched to Mac. During this year, it was given as a bonus download to all my customers and it is now available for free!
The full story and all info is in the PDF file with the plugin. Check that before using it.