[Tanjamuse]

I tried again, but got an error (again).

calibre, version 2.64.0
ERROR: Unhandled exception: <b>KeyError</b>:'enum_values'

calibre 2.64 [64bit]  embedded-python: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.9
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
Successfully initialized third party plugins: FanFicFare (2, 3, 5) && Generate Cover (1, 5, 21) && EpubMerge (2, 0, 12) && MultiColumnSearch (1, 0, 68) && Reading List (1, 6, 6) && Consolidate All Library Metadata (2, 0, 26) && Count Pages (1, 6, 9) && View Manager (1, 3, 2) && User Category (1, 5, 3) && Find Duplicates (1, 6, 2) && Modify ePub (1, 3, 13) && Job Spy (1, 0, 53) && Save Composite Custom Columns (1, 1, 0)
Traceback (most recent call last):
  File "site-packages\calibre\gui2\actions\edit_metadata.py", line 300, in edit_metadata
  File "site-packages\calibre\gui2\actions\edit_metadata.py", line 323, in edit_metadata_for
  File "site-packages\calibre\gui2\actions\edit_metadata.py", line 351, in do_edit_metadata
  File "site-packages\calibre\gui2\metadata\single.py", line 1127, in edit_metadata
  File "site-packages\calibre\gui2\metadata\single.py", line 63, in __init__
  File "site-packages\calibre\gui2\metadata\single.py", line 111, in setupUi
  File "site-packages\calibre\gui2\metadata\single.py", line 297, in create_custom_metadata_widgets
  File "site-packages\calibre\gui2\custom_column_widgets.py", line 626, in populate_metadata_page
  File "site-packages\calibre\gui2\custom_column_widgets.py", line 577, in widget_factory
  File "site-packages\calibre\gui2\custom_column_widgets.py", line 31, in __init__
  File "site-packages\calibre\gui2\custom_column_widgets.py", line 509, in setup_ui
KeyError: 'enum_values'

If you need it I'll send you the metadata.db?