[Zufi99]

Hello,

After uploading to 5.34, calibre won't launch anymore.[/B]

I have reinstalled and rebooted several times. Cleaned the registry with CCleaner. Even tried an earlier version. No chance.
I would greatly appreciate any help on this. This is the debug message I get:

calibre 5.34 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.22000 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.22000')
Python 3.8.5
Windows: ('10', '10.0.22000', '', 'Multiprocessor Free')
Interface language: None
Turning on automatic hidpi scaling
devicePixelRatio: 2.0
logicalDpi: 96.0 x 96.0
physicalDpi: 129.8044164037855 x 130.00947867298575
Using calibre Qt style: True
[0.00] Starting up...
[0.00] Showing splash screen...
[1.05] splash screen shown
[1.05] Initializing db...
[1.06] db initialized
[1.06] Constructing main UI...
Traceback (most recent call last):
File "calibre\gui2\library\models.py", line 581, in current_changed
File "calibre\gui2\library\models.py", line 566, in get_book_display_info
File "calibre\gui2\library\models.py", line 744, in cover
File "calibre\db\legacy.py", line 448, in cover
File "calibre\db\cache.py", line 762, in cover
File "calibre\db\cache.py", line 75, in call_func_with_lock
File "calibre\db\cache.py", line 802, in copy_cover_to
File "calibre\db\backend.py", line 1461, in copy_cover_to
File "shutil.py", line 202, in copyfileobj
OSError: [Errno 22] Invalid argument