Purplehayz,
Run Paint.NET
Click the File menu
Click the "View Plugin load errors" menu entry
This will show you the following error:
1 of 1
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File: C:\Program Files\Paint.NET\Effects\EdHarvey.Effects.dll
Effect Name: EdHarvey.Edfects.Effects.SurfaceBlurEffect
Full error message: System.TypeLoadException: Declaration referenced in a method implementation cannot be a final method. Type: 'EdHarvey.Edfects.Effects.SurfaceBlurEffect'. Assembly: 'EdHarvey.Effects, Version=0.6.2690.12793, Culture=neutral, PublicKeyToken=null'.
This explains why the Edfects plugin didn't load properly.
He's working on a fix. You're just gonna have to wait.