This updates improves performance and significantly reduces memory usage, adds two new translations, and fixes a number of small issues.

If you’re using the Windows Store release, you should get the update automatically within the next 24 hours. You can also force an update check by following these instructions.

For the Classic release, you should be offered the update automatically within the next week or so. You can get the update sooner by going to ⚙ Settings → Updates → Check Now. You can also download and install it directly from the website.

Changes since 4.2.8:

Reduced overall memory usage (commit size) by up to 1/3rd by eliminating the per-image scratch buffer

by eliminating the per-image scratch buffer Greatly improved performance when finishing actions of most tools by employing a shared cache between the render and commit code paths

when finishing actions of most tools by employing a shared cache between the render and commit code paths Reduced memory usage when working with many tools by consolidating homogenous tiles (those that are comprised of a single color value)

when working with many tools by consolidating homogenous tiles (those that are comprised of a single color value) Significantly improved performance of most history actions (commit, undo, redo) by switching from NTFS compression to multithreaded LZ4 compression for history files

of most history actions (commit, undo, redo) by switching from NTFS compression to multithreaded LZ4 compression for history files Significantly improved performance of undo/redo with very complex selections (e.g. from the Magic Wand tool)

of undo/redo with very complex selections (e.g. from the Magic Wand tool) Improved performance of Image -> Flatten (also affects flattening when saving)

of Image -> Flatten (also affects flattening when saving) Improved performance of the Invert Colors and Desaturate adjustments by disabling hardware acceleration for them (too much overhead in copying tiles to the GPU for such trivial rendering kernels)

of the Invert Colors and Desaturate adjustments by disabling hardware acceleration for them (too much overhead in copying tiles to the GPU for such trivial rendering kernels) Improved performance when saving by moving thumbnail rendering for the File -> Open Recent menu to a background thread

when saving by moving thumbnail rendering for the File -> Open Recent menu to a background thread Reduced memory usage when printing, and removed a rare crash that was related to its use of the (now removed) scratch buffer

when printing, and removed a rare crash that was related to its use of the (now removed) scratch buffer Improved performance of effect rendering when a complex selection is active (improved caching)

of effect rendering when a complex selection is active (improved caching) New: Added a "busy spinner" to the canvas when using the Magic Wand and Paint Bucket tools

Added a "busy spinner" to the canvas when using the Magic Wand and Paint Bucket tools New translation: Hebrew (HE)

Hebrew (HE) New translation: Slovak (SK)

Slovak (SK) Fixed a really goofy crash that required drawing with the paintbrush and, without letting go of the mouse button, moving the mouse into the toolbar and then using the mouse wheel to change the brush width

a really goofy crash that required drawing with the paintbrush and, without letting go of the mouse button, moving the mouse into the toolbar and then using the mouse wheel to change the brush width Fixed a layout bug with the image list button

a layout bug with the image list button Fixed an error that prevented saving some images as JPEGs if they had EXIF Interop metadata (PropertyNotFoundException)

an error that prevented saving some images as JPEGs if they had EXIF Interop metadata (PropertyNotFoundException) Fixed a crash when running on a CPU that supports AVX but with an OS that is configured to not support it (via bcdedit /set xsavedisable 1)

a crash when running on a CPU that supports AVX but with an OS that is configured to not support it (via bcdedit /set xsavedisable 1) Fixed a crash when pressing the spacebar after switching to a tool but before it has received any mouse input events

a crash when pressing the spacebar after switching to a tool but before it has received any mouse input events Fixed a rare crash when opening the Levels adjustments with certain types of selections

a rare crash when opening the Levels adjustments with certain types of selections Fixed a crash when checking for updates with an expired alpha/beta build

a crash when checking for updates with an expired alpha/beta build Fixed a crash (FileLoadException) when DLLs are not updated correctly by the updater

a crash (FileLoadException) when DLLs are not updated correctly by the updater Updated WebPFileType plugin to version 1.3.2 (thanks @null54!)

plugin to version 1.3.2 (thanks @null54!) Updated DDSFileTypePlus plugin to version 1.9.9. This adds support for X8B8G8R8 and R8G8B8 formats, and fixes a visual glitch when previewing cube maps in some formats. (thanks @null54!)

Enjoy!!