[DNSB]

The shutdown speed is indeed much faster. For me, most of that speed increase seems to be due to chaley's Backup Configuration Folder plugin being removed and no longer installable.

Spoiler:

calibre, version 8.99.1
ERROR: Unhandled exception: <b>InvalidPlugin</b>:Initialization of plugin Traceback (most recent call last):
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 755, in initialize_plugin
  File "calibre_plugins.BackupConfigOnCalibreClose.__init__", line 26, in __init__
  File "d:\calibre\calibre-master\src\calibre\customize\zipplugin.py", line 209, in exec_module
  File "calibre_plugins.BackupConfigOnCalibreClose.main", line 23, in &lt;module&gt;
ImportError: cannot import name 'timed_print' from 'calibre.gui2' (d:\calibre\calibre-master\src\calibre\gui2\__init__.py)
 failed with traceback:
Traceback (most recent call last):
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 755, in initialize_plugin
  File "calibre_plugins.BackupConfigOnCalibreClose.__init__", line 26, in __init__
  File "d:\calibre\calibre-master\src\calibre\customize\zipplugin.py", line 209, in exec_module
  File "calibre_plugins.BackupConfigOnCalibreClose.main", line 23, in &lt;module&gt;
ImportError: cannot import name 'timed_print' from 'calibre.gui2' (d:\calibre\calibre-master\src\calibre\gui2\__init__.py)


calibre 8.99.1*  embedded-python: True
Windows-11-10.0.26200-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '11', '10.0.26200')
Python 3.14.2
Windows: ('11', '10.0.26200', 'SP0', 'Multiprocessor Free')
Interface language: None
EXE path: C:\Program Files\Calibre2\calibre.exe
Successfully initialized third party plugins: ACSM Input (0, 1, 0) && LCPL Input (0, 0, 5) && Gather KFX-ZIP (from KFX Input) (2, 27, 1) && DeDRM (10, 0, 15) && AZW6 Image Merge (1, 1, 1) && Package KFX (from KFX Input) (2, 27, 1) && ACSM Input Plugin GUI Extension (0, 1, 0) && Apple Books covers (1, 1, 0) && Baen (1, 1, 0) && Barnes & Noble (1, 5, 7) && Count Pages (1, 14, 4) && Diaps Editing Toolbag (0, 5, 0) && EpubCheck (0, 2, 6) && EpubMerge (3, 2, 0) && EpubSplit (3, 12, 0) && FanFicFare (4, 53, 0) && Find Duplicates (1, 10, 9) && Generate Cover (2, 3, 6) && Goodreads (1, 8, 3) && Job Spy (1, 0, 239) && KFX metadata reader (from KFX Input) (2, 27, 1) && From KFX (2, 27, 1) && KFX Input (2, 27, 1) && Set KFX metadata (from KFX Output) (2, 18, 0) && KFX Output (2, 18, 0) && Kindle hi-res covers (0, 5, 1) && KindleUnpack - The Plugin (0, 83, 8) && Kobo Metadata (1, 12, 0) && Kobo Utilities (2, 24, 5) && Modify ePub (1, 8, 8) && Obok DeDRM (10, 0, 9) && Open With (1, 8, 4) && OverDrive Libby (0, 2, 101) && Quality Check (1, 14, 6) && Resize Cover (1, 2, 1) && ScrambleEbook (0, 6, 0) && SmartEject (2, 6, 0) && Smashwords Metadata (1, 0, 2)
Traceback (most recent call last):
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 755, in initialize_plugin
  File "calibre_plugins.BackupConfigOnCalibreClose.__init__", line 26, in __init__
  File "d:\calibre\calibre-master\src\calibre\customize\zipplugin.py", line 209, in exec_module
  File "calibre_plugins.BackupConfigOnCalibreClose.main", line 23, in <module>
ImportError: cannot import name 'timed_print' from 'calibre.gui2' (d:\calibre\calibre-master\src\calibre\gui2\__init__.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\calibre\calibre-master\src\calibre\gui2\preferences\plugins.py", line 321, in add_plugin
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 560, in add_plugin
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 762, in initialize_plugin
calibre.customize.InvalidPlugin: Initialization of plugin Traceback (most recent call last):
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 755, in initialize_plugin
  File "calibre_plugins.BackupConfigOnCalibreClose.__init__", line 26, in __init__
  File "d:\calibre\calibre-master\src\calibre\customize\zipplugin.py", line 209, in exec_module
  File "calibre_plugins.BackupConfigOnCalibreClose.main", line 23, in <module>
ImportError: cannot import name 'timed_print' from 'calibre.gui2' (d:\calibre\calibre-master\src\calibre\gui2\__init__.py)
 failed with traceback:
Traceback (most recent call last):
  File "d:\calibre\calibre-master\src\calibre\customize\ui.py", line 755, in initialize_plugin
  File "calibre_plugins.BackupConfigOnCalibreClose.__init__", line 26, in __init__
  File "d:\calibre\calibre-master\src\calibre\customize\zipplugin.py", line 209, in exec_module
  File "calibre_plugins.BackupConfigOnCalibreClose.main", line 23, in <module>
ImportError: cannot import name 'timed_print' from 'calibre.gui2' (d:\calibre\calibre-master\src\calibre\gui2\__init__.py)