Used to be able to open and save ico files, but now I get this: System.MissingMethodException: Method not found: 'Void PaintDotNet.Surface.SuperSamplingFitSurface(PaintDotNet.Surface)'. at PaintDotNet.Data.PDNIcoCurFormat.GetBMImageFromDoc(Size desiredSize) at PaintDotNet.Data.PDNIcoCurFormat.SaveImagesMerged(EOIcoCurWriter icoWriter) at PaintDotNet.Data.PDNIcoCurFormat.OnSave(Document input, Stream output, SaveConfigToken token, Surface scratchSurface, ProgressEventHandler callback) at PaintDotNet.FileType.Save(Document input, Stream output, SaveConfigToken token, Surface scratchSurface, ProgressEventHandler callback, Boolean rememberToken) in d:\src\pdn\paintdotnet\src\Data\FileType.cs:line 284 at PaintDotNet.Controls.DocumentWorkspace.<>c__DisplayClass30.<DoSave>b__28() in d:\src\pdn\paintdotnet\src\PaintDotNet\Controls\DocumentWorkspace.cs:line 2954 at PaintDotNet.Functional.Func.Try(Action f) in d:\src\pdn\paintdotnet\src\Base\Functional\Func.cs:line 174 Using paint.net 4.0.3 IcoCur.dll 220.127.116.11 Update 1: After removing all Effects from the folder, I can now save as a .ico... Looks like I'll be hunting down which one is the culprit since the program doesn't show any failed plugins in the settings. Final Update: Well that's embarrassing... Some of the .dll's that were in the FileTypes were also in the Effect folder. After removing those, everything works fine... Don't make my mistake !!!