[seans]

I'm selecting "Configuration" for the plugin, and get an unhandled exception:

calibre, version 4.12.0
ERROR: Unhandled exception: <b>TypeError</b>:'>' not supported between instances of 'int' and 'str'

calibre 4.12 embedded-python: False is64bit: True
Linux-5.6.19-200.fc31.x86_64-x86_64-with-fedora-31-Thirty_One Linux ('64bit', 'ELF')
('Linux', '5.6.19-200.fc31.x86_64', '#1 SMP Wed Jun 17 16:54:35 UTC 2020')
Python 3.7.7
Linux: ('Fedora', '31', 'Thirty One')
Interface language: None
Successfully initialized third party plugins: Library Codes (1, 0, 42)
Traceback (most recent call last):
File "calibre_plugins.library_codes.ui", line 250, in init_librarycodesdialog
File "calibre_plugins.library_codes.library_codes_dialo g", line 109, in __init__
TypeError: '>' not supported between instances of 'int' and 'str'