I did delete it, intending to 'git restore' it. It was recreated when I started Calibre again. That's why I called a generated file.
EDIT: Here's the startup debug output:
Spoiler:
Code:
calibre 9.3.1* embedded-python: True
Windows-10-10.0.19045-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19045')
Python 3.14.2
Windows: ('10', '10.0.19045', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Users\user\Desktop\nook\CalibrePorts\9\Calibre\calibre-debug.exe
Successfully initialized third party plugins: EpubMerge (3, 2, 1) && EpubSplit (3, 12, 0) && FanFicFare (4, 54, 5) && SmartEject (2, 6, 1)
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\filename_pattern.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\catalog\catalog_bibtex.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\catalog\catalog_epub_mobi.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\catalog\catalog_tab_template.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\azw3_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\comic_input.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\debug.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\docx_input.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\epub_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\fb2_input.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\fb2_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\font_key.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\heuristics.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\htmlz_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\kepub_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\look_and_feel.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\lrf_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\metadata.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\mobi_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\page_setup.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\pdb_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\pdf_input.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\pdf_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\pmlz_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\rb_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\regex_builder.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\rtf_input.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\search_and_replace.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\snb_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\structure_detection.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\toc.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\txt_input.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\txt_output.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\convert\xpath_wizard.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\device_drivers\configwidget.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\catalog.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\choose_format_device.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\choose_library.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\conversion_error.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\delete_matching_from_device.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\device_category_editor.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\drm_error.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\edit_authors_dialog.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\jobs.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\match_books.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\metadata_bulk.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\password.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\quickview.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\smartdevice.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\tag_categories.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\tag_editor.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\tag_list_editor.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\dialogs\template_dialog.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\lrf_renderer\config.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\lrf_renderer\main.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\adding.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\behavior.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\columns.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\email.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\metadata_sources.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\misc.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\plugboard.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\plugins.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\save_template.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\saving.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\search.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\sending.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\template_functions.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\toolbar.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\bookshelf_view.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\book_details.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\cover_grid.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\cover_view.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\edit_metadata.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\main_interface.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\quickview.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\tb_display.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\tb_hierarchy.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\tb_icon_rules.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\preferences\look_feel_tabs\tb_partitioning.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\basic_config_widget.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\config\chooser\adv_search_builder.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\config\chooser\chooser_widget.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\config\search\search_widget.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\search\adv_search_builder.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\search\search.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\stores\mobileread\adv_search_builder.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\stores\mobileread\cache_progress_dialog.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\store\stores\mobileread\store_dialog.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\wizard\device.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\wizard\finish.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\wizard\kindle.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\wizard\library.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\wizard\send_email.ui
Compiling form C:\Users\user\Desktop\nook\calibre\src\calibre\gui2\wizard\stanza.ui
Compiled 96 forms
Building icons.rcc
QPA platform: windows
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 141.7674418604651 x 141.4020618556701
ApplicationPaletteChange event ignored
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[1.16] splash screen shown
[1.16] Initializing db...
[1.17] db initialized
[1.17] Constructing main UI...
[2.52] GUI main window shown
EpubMerge: DEBUG: 2026-02-23 09:17:22,149: calibre_plugins.epubmerge.epubmerge_plugin(156): macmenuhack file_path:C:\Users\user\Desktop\nook\CalibrePorts\9\Calibre Settings\plugins\fanficfare_macmenuhack.txt
FFF: DEBUG: 2026-02-23 09:17:22,157: calibre_plugins.fanficfare_plugin.fff_plugin(218): Plugin FanFicFare macmenuhack file_path:C:\Users\user\Desktop\nook\CalibrePorts\9\Calibre Settings\plugins\fanficfare_macmenuhack.txt
[2.60] main UI initialized...
[2.60] Hiding splash screen
[2.60] splash screen hidden
[2.60] Started up in 2.60 seconds with 11 books