SUMMARY On Windows 11 Pro using version 23.09 "Open new files in tabs" does not change the behavior of opening new files in their own window. PDF Backend Version 0.6.5 A PDF file renderer, Using Poppler 23.09.0 STEPS TO REPRODUCE 1. Install Okular from Microsoft store on Windows 11 pro 2. Open Okular for the first time, go to Settings -> General -> Program Features: and check "Open new files in tabs" and leave "Switch to existing tab if file is already open" checked. 3. Try to open two different PDF documents from file explorer OBSERVED RESULT Subsequent PDF documents open in their own application windows. EXPECTED RESULT Subsequent PDF documents should open in new tabs in the original application window. SOFTWARE/OS VERSIONS Windows: 11 Pro KDE Plasma Version: Not sure KDE Frameworks Version: 5.109.0 Qt Version: 5.15.10 ADDITIONAL INFORMATION