4.3.3 is now available

In this release, Paint.NET has been migrated to the just-released .NET 6. This comes with additional improvements for both rendering and startup performance, as well as ensuring that myself and plugin authors can develop using the latest version of the platform, including C# 10.

There are also some improvements to Dark Theme support on Windows 10/11, UI fixes for Windows 11, three new translations (Catalan, Corsican, and Thai), and a large number of important bug fixes — including some memory leaks that were found by several members of the forum.

I’ve also done some important infrastructure work. Prior to this release, the self-extracting portion of the installer was handled by Nullsoft Scriptable Installer System ("NSIS"). This worked very well for a long time, but it finally hit a wall with the 4.3 release with how well it could compress the installer due to memory constraints (NSIS is 32-bit only). This is why the ARM64 installer was so much larger than the x64 or x86 installer. In this release I’ve fixed that by moving to a custom self-extractor based on the LZMA SDK (aka 7-zip). The result is better compression and a faster "extracting" stage, although the x64 and x86 installers are actually a little larger because I’m using some features in .NET 6’s "crossgen2" to optimize startup performance, and these have resulted in an increase in the size of the app DLLs.

I’ve also migrated most of Paint.NET’s non-COM interop code over to the TerraFX.Interop.Windows library, developed by Tanner Gooding at Microsoft. I’ll be using this over the next several releases to port Paint.NET’s COM-based interop code, which is used for Direct2D (et. al.), and which should result in more startup performance improvements (the current interop code is written in C++/CLI, which cannot be precompiled with crossgen / ReadyToRun). Over time this will help to maximize Paint.NET’s performance, shed legacy code (e.g. C++/CLI), and increase the speed that I can write new code and release new updates.

NOTE for Windows 7, Windows 8.1, and 32-bit/x86 users: Paint.NET v4.3.x will be the last release(s) that work on Windows 7, Windows 8.1, or on any 32-bit/x86 version of Windows. It has become significantly more difficult and time consuming to support these lately, not very many people are using them, and I can no longer justify the cost and frustration of keeping support for these afloat. Starting with Paint.NET v4.4, only Windows 10 and 11+ will be supported, and only on 64-bit (x64 and ARM64). Once Paint.NET v4.3.3 is released, I will start working on v4.4 and will only release v4.3.x updates on an as-needed basis and only until v4.4 is completed.

Get the update

  • Microsoft Store release
  • Classic Desktop release
    • Download the installer directly (web installer for all CPUs and OSes). This is the recommended download if you don’t have Paint.NET installed. It can also be used to update the app.
    • If you already have it installed, you should be offered the update automatically within the next week or so, but you can also get it immediately by going to ⚙ Settings -> Updates -> Check Now.
    • Offline Installers and Portable ZIPs are available over on GitHub.

Changes since v4.3.2:



14 thoughts on “ 4.3.3 is now available

  1. Sad says:

    I didn’t realize that previous versions are removed once a new release comes out.
    Maybe keep the previous 1-2 old versions available in case of bugs / plugin issues.

  2. Sad says:

    Windows 8.1 bug (no icons under the effects menu, only under sub menu’s under effects.

      • SAD says:

        Ok, my bad. It looks like the background behind the icons is a lot brighter now and really stands out compared to the text column in the menu. That’s what changed compared to the previous version. This is using the light theme, which looks nothing like the “effects” menu screenshots on your site.

    • Rick Brewster says:

      Yes I spent a good amount of time analyzing the merits of FDD versus SCD, and SCD won out in the end. Earlier builds of 4.3 alpha were actually FDD. The only real benefit to FDD is a smaller package, but even then you still want to keep installing the latest .NET runtime and you don’t actually save much in terms of download bandwidth or disk space. In fact, with SCD, you probably save disk space because installing newer .NET runtimes does not uninstall/replace the old one, so you end up with many of them installed. It also doesn’t get updated by Windows Update unless you’ve enabled the optional “also install updates for Microsoft products”, which most people don’t. SCD also enables higher performance because crossgen can compile the ReadyToRun images more holistically (–inputbubble), which will be very advantageous once I can use “composite” mode (I can’t use it right now due to , so either once that’s fixed or when 4.4 releases, which will not run on Win7 so the issue could be moot).

      Also, FDD is very fragile. If any of the .NET runtime files are damaged, corrupt, removed — which happens often enough in my experience judging from crash logs sent by users — it’s difficult for a user to troubleshoot that and it really ruins the experience.

  3. Violet-n-red says:

    thank you for your effort 🙂 too bad the pen/tablet support didn’t make it in before Win7 support got dropped – i’ve grown quite comfy using your paint .NET and was hoping i won’t need to have separate drawing and editing apps soon enough. oh well, no big deal, i’ll have to update everything one day anyway. and thank you again!

  4. JFWS says:

    Thank you for upgrading Paint.NET, this editing software is really a huge time saver and efficient software thanks to all your work ; )

    Have a great day !

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