Calibre 9.3 refines the Windows installer to prevent conflicts and fixes KEPUB cover aspect ratios for Kobo devices. This maintenance update also resolves bugs and improves overall software stability.
Calibre, the popular open-source ebook management software, has rolled out version 9.3. This update delivers targeted refinements to its Windows installer and KEPUB conversion, alongside several key bug fixes.
This release focuses on improving stability and user experience. It builds upon the foundation of previous versions with practical, user-focused enhancements.
The Windows installer is now more intelligent. It can detect if Calibre is already running during setup.
If the application is open, users are prompted to close it before proceeding. This prevents potential file conflicts and ensures a smoother, more reliable installation process.
For Kobo e-reader users, the KEPUB conversion process has been refined. Version 9.3 now preserves the original aspect ratio of cover images during conversion.
This fixes a minor visual issue where book covers could appear stretched or squashed on the device's library screen.
A usability quirk in the Preferences menu has been resolved. Users no longer need to click "Apply" twice for certain settings to take effect.
The update also addresses several bugs. These include issues with file output in specific scenarios, problems with metadata download plugins, and compatibility fixes for various e-reader drivers across Windows, macOS, and Linux.
The update makes the Windows installation process more robust by preventing conflicts. Kobo users benefit from correctly proportioned book covers after conversion.
Fixing the double-apply quirk in Preferences improves the overall configuration experience. The bundled bug fixes enhance stability for library management, conversion, and device syncing.
As always, Calibre remains completely free and open-source. Users can update directly through the application's built-in updater.
This is an incremental update, so it doesn't introduce major new features or a significant interface overhaul. Users expecting groundbreaking changes might be disappointed.
The fixes, while important, are largely for edge cases and specific workflows. The core functionality of the software remains unchanged from the previous version.
Calibre 9.3 is a solid maintenance release that polishes existing features. It demonstrates the project's ongoing commitment to refining its core tools for managing digital book collections.
The improvements to the installer and KEPUB conversion directly address user-reported issues. For more on essential software for book lovers, explore our guides on ebook tools and file conversion software.
