Paint.NET 4.1.5

* Fixed: The Rounded Rectangle shape's rendering was incorrect for some values of "Corner size"
* Fixed: Effects and Adjustments were crashing the app on systems with only 1 CPU core, or virtual machines configured for only 1 CPU

- New: Rounded Rectangle's corner size ("radius") is now configurable.
- New: Overscroll can now be disabled from within Settings.
- Fixed: The Zoom tool was broken in 4.0.10.
- Fixed: Auto scroll will no longer engage overscroll. This prevents the image from shooting off in all directions when drawing on it or when making a selection.
- Fixed: Panning with the middle mouse button would sometimes be "sticky"
- Fixed: Effect rendering performance had significantly regressed in 4.0.10, by as much as 50%, on Intel CPUs with HyperThreading.
- Fixed: Selecting the entire image and then using Zoom to Selection or the Zoom Tool would align the image in an awkward manner.
- Fixed: In rare cases, Settings -> Plugin Errors was hanging the whole system (bug in WPF?). This UI is now implemented in WinForms instead of WPF.
- Fixed: Some more high-DPI issues, especially when using multiple monitors with mixed DPI, or when using Remote Desktop.

- New: The canvas may now be scrolled past the edge of the image
- New: When holding the spacebar, you may scroll using the keyboard arrow keys (in addition to click-and-drag panning). Holding Ctrl will scroll at 10x the rate.
- New: You can now hold Ctrl+Shift while clicking on the floating window icons in order to reset their location and docking. Ctrl+Shift along with the appropriate hotkey (F5, F6, F7, F8) also does the trick.
- Improved: The rate of auto-scrolling, which triggers when the mouse is at the canvas edge and a button is being held down, has been improved and is based on time instead of frames
- Improved: Fixed Size selection drawing now defaults to 400x300 pixels instead of 4x3 inches
- Improved: Tooltips for Custom Shapes now include their file system location
- Improved: Edit->Invert Selection should perform much faster when used with unmodified selections from the Magic Wand tool
- Improved: When running within VMWare, "Hardware accelerated rendering" is disabled by default (Microsoft's WARP is faster than VMWare's D3D emulation)
- Fixed: Erratic brush/pencil drawing when running within VMWare (this is caused by a bug in Win32's GetMouseMovePointEx API, and is not actually limited to VMWare)
- Fixed: Color Picker tool could crash if used at the bottom of the image,
- Fixed: There was a glitch in the Gradient tool's rendering when dx was equal to dy,
- Fixed: The Layers window would sometimes auto-scroll the active layer to the bottom when performing certain operations,
- Fixed some mouse cursor glitches when using panning using the spacebar
- Fixed many glitches and a few crashes in the image size dialogs (File->New, Image->Resize, Image->Canvas Size)
- Fixed a problem with inconsinstently skipped input when using the arrow keys to move tool handles,
- Fixed: Custom Shapes did not always have the correct bounding box, and would have weird behavior as a result
- Fixed: Line/Curve handles were unusable for up to 500ms after adjusting properties in the toolbar
- Fixed some crashes and soft hangs in the Save Configuration dialog
- Fixed a blemish at the top of the main window when Windows is set to 200% DPI
- Fixed: There were some precision bugs with IndirectUI sliders that would cause them to get "stuck" at certain values (mostly affects effect plugins)
- Improved: IndirectUI's Angle Chooser control now supports the DecimalPlaces property (for plugins)
- Improved: IndirectUI's Slider controls now support all-negative ranges (e.g. [-200, -20])

* New: The canvas may now be scrolled past the edge of the image (aka "overscroll")
* New: When holding the spacebar, you may scroll using the keyboard arrow keys (in addition to click-and-drag panning). Holding Ctrl will scroll at 10x the rate.
* Improved: The rate of auto-scrolling, which triggers when the mouse is at the canvas edge and a mouse button is being held down, has been improved and is based on time instead of frames
* Improved: Fixed Size selection drawing now defaults to 400x300 pixels instead of 4x3 inches
* Improved: Tooltips for Custom Shapes now include their file system location
* Improved: Edit->Invert Selection should perform much faster when used with unmodified selections from the Magic Wand tool
* Improved: When running within VMWare, "Hardware accelerated rendering" is disabled by default (Microsoft's WARP is faster than VMWare's D3D emulation)
* Fixed: Erratic brush/pencil drawing when running within VMWare (this is caused by a bug in Win32's GetMouseMovePointsEx API, and is not actually limited to VMWare)
* Fixed: Color Picker tool could crash if used at the bottom of the image
* Fixed: There was a glitch in the Gradient tool's rendering when dx was equal to dy
* Fixed: The Layers window would sometimes auto-scroll the active layer to the bottom when performing certain operations
* Fixed some mouse cursor glitches when using panning using the spacebar
* Fixed many glitches and a few crashes in the image size dialogs (File->New, Image->Resize, Image->Canvas Size)
* Fixed a problem with inconsinstently skipped input when using the arrow keys to move tool handles
* Fixed: Custom Shapes did not always have the correct bounding box, and would have weird behavior as a result
* Fixed: Line/Curve handles were unusable for up to 500ms after adjusting properties in the toolbar
* Fixed some crashes and soft hangs in the Save Configuration dialog
* Fixed a blemish at the top of the main window when Windows is set to 200% DPI
* Fixed: There were some precision bugs with IndirectUI sliders that would cause them to get "stuck" at certain values (mostly affects effect plugins)
* Improved: IndirectUI's Angle Chooser control now supports the DecimalPlaces property (for plugins)
* Improved: IndirectUI's Slider controls now support all-negative ranges (e.g. [-200, -20])

- Fixed: Selection tools would sometimes crash.
- Fixed: Line/Curve tool would draw nothing if the Shapes tool was configured for "Draw Filled Shape".
- Fixed: Thumbnails for .PDN files were not working on some systems.
- Fixed: The "Finish" button in the toolbar would not update its enable/disable state when switching between images.

- Fixed: The Line/Curve tool was crashing when drawing vertical lines of particular lengths.

* Changed: .NET Framework 4.6 is now required, and will be installed if necessary
* New: Swedish translation
* Fixed: Title bar now uses the Windows 10 accent color
* Fixed: Floating windows were not remembering their locations on some non-English systems
* Improved: Performance of "committing" (finishing) is now up to 10x faster, which greatly improves responsivness for quick drawing operations
* Improved Shapes tool quality when drawn without antialiasing, with line styles, and at 1 pixel brush width
* Improved Shapes tool rendering performance on CPUs with many cores (8+)
* Improved: Installing a "complex" custom Shape no longer causes very long hangs at app startup
* Improved: Image->Resize is now much faster
* Fixed: Image->Resize would sometimes cause the main window to flicker or lose focus
* Fixed: Image->Resize would sometimes do nothing instead of resizing the image to a very large size
* Fixed: Labels on the vertical ruler were misleading because they were on the wrong side of the tick mark
* Improved the ruler's performance
* Fixed: Edit->Copy now works if the data copied to the clipboard is larger than 2GB
* Fixed: Page Up, Page Down, Home, and End keys now work in the main canvas area
* Fixed: Paint.NET will no longer incorrectly block Windows from restarting
* Fixed: Rotate/Zoom no longer crashes on very large images
* Improved: Reduced CPU/GPU and battery use when the app is not in the foreground
* Improved: Reduced CPU and battery use of the UI for the Move and Shapes tools
* Added: Custom Shapes XAML now supports cardinal splines via PolyCurveSegment (a new PathSegment type)
* Improved: Various performance improvements
* Fixed: Several rare or uncommon crashes

* New: You can now create and install custom shapes for the Shapes tool.
* New: Updated to work better with Windows 10.
* New: Increased the maximum brush size to 2000.
* New: IndirectUI-based effect plugins can now provide help text, accessible via the question mark button.
* New: Effect plugins may now access the current palette via IPalettesService.
* Improved: Reduced memory usage of brush tools when using large brush sizes.
* Fixed: Holding shift to constrain the angle of the roll control (Layers -> Rotate/Zoom) wasn't working correctly.
* Fixed: Various shapes (hexagon, pentagon, triangle, etc.) are now symmetric when holding the shift key.
* Fixed: Multiple high-dpi blemishes in the main window and many dialog boxes (Settings, Save Configuration, all effect dialogs, etc.)
* Fixed: Various minor/rare crashes.

* Fixed: Subtraction mode in the Magic Wand tool was generating B-A instead of A-B.
* Fixed: Crash when using Effect –> Repeat.
* Fixed: Crash (AccessViolationException) on some systems when initializing the canvas for hardware accelerated rendering. It will still crash but then switch to software rendering for the next startup, which will then avoid the crashing.
* Fixed: Crash when clicking on the Shapes tool if you had run an old 4.0 beta/alpha and had also changed which shape is used at startup to be a line or curve.
* Fixed: Crash when using Settings –> Update –> Check Now due to incorrectly determining that UAC is not enabled.

* New: Added a 'Fill' property to the Paintbrush tool (regression from 3.5).
* Faster: Move Selected Pixels has been significantly optimized.
* Faster: Magic Wand Tool has been significantly optimized.
* Faster: Working with aliased selections ("aliased selection quality" in the toolbar) has been significantly optimized.
* Faster: Edit->Copy and Edit->Copy Merged are now up to 2x faster.
* Faster: Drawing when a selection is active; clipping performance is now improved.
* Fixed: The Text tool no longer produces terrible looking text when using Smooth rendering mode without antialiasing.
* Fixed: The Gear shape had a few glitches.
* Fixed: Using a Fill pattern with the Paint Bucket would sometimes produces misaligned or "corrupt looking" results.
* Fixed: The alignment of the menu buttons in the top-right was off by 2 pixels, causing them to look weird at high-DPI.
* Fixed: The zoom buttons in the status bar would not recognize clicks unless the main window was already in focus.
* Fixed: Some incorrect errors about requiring Windows 7 SP1 when launching the installer from something like an old version of WinZip.
* Fixed: Edit->Clear Selection and Edit->Cut were filling with transparent black (#00000000) instead of transparent white (#00FFFFFF). This caused some discrepancies compared to older versions of Paint.NET (regression from 3.5).
* Fixed: Pressing Ctrl+A when a drawing tool was active would sometimes incorrectly show a tinted selection.
* Fixed: Text in the title bar was not visible when using a 3rd party Aero theme with black titlebars.

* New: Added a 'Fill' property to the Paintbrush tool
* Faster: Move Selected Pixels has been significantly optimized.
* Faster: Magic Wand Tool has been significantly optimized.
* Faster: Working with aliased selections ("aliased selection quality" in the toolbar) has been significantly optimized.
* ​Faster: Edit->Copy and Edit->Copy Merged are now up to 2x faster.
* Faster: Drawing when a selection is active; clipping performance is now improved.
* Fixed: The Text tool no longer produces terrible looking text when using Smooth rendering mode without antialiasing.
* Fixed: The Gear shape had a few glitches.
* Fixed: Using a Fill pattern w/ the Paint Bucket would sometimes produces misaligned or "corrupt looking" results.
* Fixed: The alignment of the menu buttons in the top-right was off by 2 pixels, causing them to look weird at high-DPI.
* Fixed: The zoom buttons in the status bar would not recognize clicks unless the main window was already in focus.
* Fixed: Some incorrect errors about requiring Windows 7 SP1 when launching the installer from something like an old version of WinZip.
* Fixed: Edit->Clear Selection and Edit->Cut were filling with transparent black (#00000000) instead of transparent white (#00FFFFFF). This caused some discrepancies compared to older versions of Paint.NET.
* Fixed: Pressing Ctrl+A when a drawing tool was active would sometimes incorrectly show a tinted selection.
* Fixed: Text in the title bar was not visible when using a 3rd party Aero theme with black titlebars.

* Changes:
- Further improved performance when working with images that have a lot of layers.
- Fixed some flickering in the Layers form.
- Fixed the Language selector in the Settings dialog.
- Fixed 2-finger touchpad and touch screen scrolling.
- Aero peek thumbnails now include the pixel grid if it’s enabled.
- Fixed a crash in the thumbnail renderer that sometimes happened when switching between images.
- Ctrl+W no longer exits the application if zero images are open.

* Changes
- Fixed the gamma and contrast for text rendering on some systems where the wrong values were being used ("rainbow" text)
- Colors window now correctly lets you paste a hex color value that starts with a hash, e.g. #112233
- Gradient tool now lets you reverse a transparency gradient by clicking the right mouse button on one of the handles (regression from 3.5)
- Move Selected Pixels now lets you hold Control to leave a copy of the selected area behind on the initial move (regression from 3.5)
- Paint Bucket tool’s hatch fill modes weren’t working with the Overwrite blending mode (regression from 3.5)
- Fixed a keyboard tabbing issue in the Resize dialog (regression from 3.5)
- Fixed the language setting in the Settings dialog not always allowing you to set it to English if your system’s default language is non-English
- Fixed a performance issue that caused images with many layers (50+) to take a VERY long time to open, close, or even switch away from (regression from 3.5)
- Fixed a rare crash at application exit
- Fixed an issue that prevented 4.0.1 from installing on top of 4.0 when using the MSI (e.g. AD/GPO network deployment)
- Fixed an issue that would sometimes cause the installer to take 30+ seconds to appear