Originalmente publicado en Paint.NET Blog:
The primary goal of this update is preparing for the v4.0 release: v3.5.10 will not be able to offer the v4.0 update, but v3.5.11 will. I’m not a fan of putting out an update for purely infrastructure purposes so I’ve also reverse-ported a handful of low-risk improvements from the v4.0 code base. This way we all win.
As usual, you can download it directly from the website or you can use the built-in updater via Utilities –> Check for Updates.
Here are the changes for this release: