This update adds a new Dark Theme, significantly improves High DPI support, adds Explorer thumbnails for TGA and DDS image types, and also includes a whole lot of small improvements and bug fixes.
If you’re using the Windows Store release, you should get the update automatically within the next day or so.
For the Classic release, you can use the built-in updater by going to ⚙ Settings → Updates → Check Now. You can also download it directly from the website.
Changes:
- New: Dark Theme support
- New: .NET Framework 4.7 is now required, and will be automatically installed if needed
- New: Explorer thumbnails are now supported for TGA and DDS file types
- Fixed and Improved: High-DPI support throughout the application
- Fixed: Color Picker tool was not always honoring the "Switch to previous tool" setting
- Fixed the arrow keys not working properly until the second shape (or line/curve) was drawn. Reported here: https://forums.getpaint.net/topic/112145-moving-points-in-lines-not-working-how-its-supposed-to/
- Fixed the zoom slider being "wiggly" while being dragged around
- Fixed a glitch with the mouse cursor (resize handle) at the lower-left corner of the main window
- Fixed a crash in the Shape tool renderer (BadNumberException via ID2D1Geometry::GetWidenedBounds)
- Fixed a hang in the Frosted Glass effect that was reported here: https://forums.getpaint.net/topic/112005-frosted-glass-hangs-indefinitely-on-a-1×1-pixel-image/
- Fixed a hang in the Levels adjustment that was reported here: https://forums.getpaint.net/topic/111629-hang-bug-in-a-levels-tool/
- Fixed a rendering issue in the Move Selected Pixels tool that was reported here: https://forums.getpaint.net/topic/112187-selections-out-of-bounds-use-the-out-of-bounds-pixels-when-resizing/
- Fixed: Canvas now processes WM_MOUSEHWHEEL, which was preventing some horizontal mouse wheels and trackpad swipe gestures from working properly
- Fixed: Plugins will no longer completely crash the app on Windows 10 S (note, however, that plugins other than custom Shapes do not work on Windows 10 S)
- Fixed: a data loss bug when saving very large images (greater than 4GB). Reported here: https://forums.getpaint.net/topic/111823-large-image-save-bug/
Enjoy!
paint.net blog 
Dark theme, nice! Should help the eyes to relax when working late in the dark. P.S. The french part about Win 10/Windows Store when installing is badly translated, just saying for next time.
I just tried to install Paint.net 4.0.20 on my windows 10 system, and it failed totally. The installer gave me a window saying “The following will be installed:
.net framework 4.7.1
paint.net
I click OK and get a window indicating files are downloading and then nothing! What’s happening?
Update your Windows 10, You need 1607 or later for .NET Framework 4.7.x
Finally! Dark theme!!
The dark theme is coming along nicely but still needs some work on the dropdown controls such as around the brush width drop down where there is a jarring white border.
I really appreciate the dark theme, it’s time for a donation!
There is either a bug now or an unwanted function. When copying and pasting a large image to a smaller frame and selecting “Keep Canvas Size” the image will copy, but then any attempt to adjust the size of the selected image will immediately cut all of the edited image, leaving only the initial upper left corner piece that was visible upon initial copy/paste.
Yeah this is a new bug and I’ve been getting a bunch of reports for it 😬😕 I’ll be sending out a 4.0.21 update shortly!
I run Windows 10 Pro version 1511 build 10586.
It has .NET Framework 4.6.1.
The paint.net 4.0.20 install/upgrade says it is going to install .NET 4.7.1.
I stopped the install, and downloaded .NET Framework 4.7.1 manually, but it says it is not supported on my version of Windows.
Q. Do I go ahead an upgrade paint.net (and will the 4.7.1 framework install just fail or something)?
I just read at https://docs.microsoft.com/en-us/dotnet/framework/install/on-windows-10 “…If you’re using Windows 10 1507 or 1511 and you want to install the .NET Framework 4.7.1, you first need to upgrade to a later Windows 10 version.”. Hmm. Not sure I want to, if that means succumbing to MS controlling my Windows Updates.
Q. Does this mean I can’t run paint.net 4.0.20 or beyond?
You really do need to make sure you install all Windows updates. This is becoming increasingly more important for security reasons, as witnessed with the recent Meltdown/Spectre fiasco.
If you refuse to install Windows updates, then yes you will eventually be left behind with respect to Paint.NET updates as well.
See also: https://blog.getpaint.net/2017/10/23/paint-net-4-0-20-and-net-4-7/
I really like the dark theme! Another reason to use paint.net as my main image editor
Mist, dass man während der Installation keinen Installationspfad wählen kann…!!!
You can choose a custom installation path. Simply choose “Custom” on the first page when running the installer.