Thanks Ego Eram Reputo, here is the text:
File: C:\Program Files\Image Editors\Paint.net\Effects\SeamlessTextureMaker.dll
Name: SeamlessTextureMaker.Effects.SeamlessTextureMakerEffect
Version: 1.2.5.29984
Author: MadJik
Copyright: Copyright © 2017 MadJik (Jean-Claude JAY)
Website: http://forums.getpaint.net/index.php?showtopic=4591
Full error message: System.TypeLoadException: Could not load type 'PaintDotNet.IndirectUI.WindowHelpContentType' from assembly 'PaintDotNet.Core, Version=4.5.5454.39504, Culture=neutral, PublicKeyToken=null'.
at SeamlessTextureMaker.Effects.SeamlessTextureMakerEffect.OnCustomizeConfigUIWindowProperties(PropertyCollection props)
at PaintDotNet.Effects.PropertyBasedEffect.CreateConfigDialog() in d:\src\pdn\paintdotnet\src\Effects\PropertyBasedEffect.cs:line 86
at PaintDotNet.Menus.EffectMenuBase.RunEffectImpl(Type effectType) in d:\src\pdn\paintdotnet\src\PaintDotNet\Menus\EffectMenuBase.cs:line 910
Chicken_Legs.