Blog: v3.9.15 (#794)

Author: yaira2

src/routes/blog/posts/v3-9-15/+page.md

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+---
+title: Announcing Files Preview v3.9.15
+description: Announcing Files Preview v3.9.15 for users of the preview version.
+thumbnail: /blog-resources/v4-preview/3-9-15.png
+date: 8/13/2025
+author: files-community
+---
+
+Today we are releasing **Files Preview v3.9.15** for users of the preview version. New users can get started from our [download page](/download/). If you'd like to support the project, consider purchasing Files on the [Microsoft Store](ms-windows-store://pdp/?ProductId=9NSQD9PKV3SS&cid=FilesWebsite) or sponsoring us on [GitHub](https://github.com/sponsors/yaira2). Your support is greatly appreciated but entirely optional.
+
+## Changes
+
+### Auto sized columns in Columns View
+
+Columns now automatically adjust their width when opened, making navigation cleaner and more intuitive.
+
+### Improved Dual Pane experience
+
+When splitting a pane, the new pane now opens to match the path of the current pane.
+
+### Browse all images formats in file picker
+
+You can now browse all supported image formats when selecting a background image in Settings.
+
+### Added actions to open log file and folder
+
+We added two new actions to  make it easier to access diagnostic logs:
+
+- Open log file
+- Open log folder
+
+### Updated 7zip dependency
+
+We've upgraded the 7zip library to version 25.01.
+
+## Fixes
+
+### Dual Pane
+
+- Fixed an issue where the inactive pane would steal focus during file changes.
+- Resolved a bug where switching layouts incorrectly focused the right pane.
+
+### Toolbar
+
+- Fixed issue where the 'layout' icon didn't match the select layout.
+
+
+## Conclusion
+
+As always, we appreciate your feedback and suggestions on how we improve Files. You can reach us on [Discord](https://discord.gg/files) and on [GitHub](https://github.com/files-community/Files/).
+
+Thank you for using Files! 😊
+
+---
+
+Download Files Preview from the [Microsoft Store](ms-windows-store://pdp/?ProductId=9NSQD9PKV3SS&cid=FilesWebsite) | Sponsor us on [GitHub](https://github.com/sponsors/yaira2/)