I've just replaced the 2012 version of EdHarvey.Effects.dll with the 1/20/2014 version, and now when I start Paint.Net I don't seem to have any of the plugins in it. (E.g., soft saturation is gone, which I would have expected, but I don't have vibrance either.)
Is the problem simply that I'm still using Paint.Net v3.5.11, rather than upgrading to 4? (If not, any ideas what the problem is?)