I too am experiencing the 'Void PaintDotNet.Surface.SuperSamplingFitSurface' error. I have no .dll's in my effects folder and only the IcoCur.dll in FileTypes. IcoCur.dll Version 184.108.40.206 Paint.Net Version 4.0.5 (Final 4.5.5454.39504) Windows 7 Pro A gazillion gigs of memory.
I have searched, googled and tried to figure it out. There has to be an easy way I am simply trying to draw a bezier curve and have a line of text follow it. I had no idea how challenging it would be. Feel free to yell at me if it has already been explained, as long as you point me to it, My googlefoo let me down. Ed