Here's the error message:
File: C:\Program Files\Paint.NET\Effects\PixelatedFrame.dll
Effect Name: PixelatedFrame.EffectPlugin
Full error message: PaintDotNet.WorkerThreadException: Worker thread threw an exception ---> System.DivideByZeroException: Attempted to divide by zero.
at PixelatedFrame.EffectPlugin.Render(EffectConfigToken parameters, RenderArgs dstArgs, RenderArgs srcArgs, Rectangle[] rois, Int32 startIndex, Int32 length)
at PaintDotNet.Effects.BackgroundEffectRenderer.RendererContext.RenderImpl()
--- End of inner exception stack trace ---
at PaintDotNet.Effects.BackgroundEffectRenderer.Join()
at PaintDotNet.Effects.BackgroundEffectRenderer.Abort()
at PaintDotNet.Effects.BackgroundEffectRenderer.Start()
at PaintDotNet.Menus.EffectMenuBase.<>c__DisplayClassb.b__8(Object sender, EventArgs e)