This plugin allows G'MIC-Qt to be used as a Paint.NET Effect.
Menu location: Effects > Advanced > G'MIC-Qt
Filters that require top and bottom layers can be used by placing the top layer on the clipboard, the currently selected layer will be used as the bottom layer.
Some icons are from or based on those in the Fugue icon set by Yusuke Kamiyamane.
To install place Gmic.dll and the gmic fold