I tried Reset Defaults also and got
KeyError: u'CSScm2em_css-cms-to-ems'
Spoiler:
calibre, version 2.12.0
ERROR: Unhandled exception: <b>KeyError</b>:u'CSScm2em_css-cms-to-ems'
calibre 2.12 [64bit] isfrozen: True is64bit: True
Windows-7-6.1.7601-SP1 Windows ('64bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.8
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
Successfully initialized third party plugins: Modify ePub && Open With && EpubMerge && Diaps Editing Toolbag && Manage Series
Traceback (most recent call last):
File "site-packages\calibre\gui2\tweak_book\preferences.py", line 677, in restore_current_defaults
File "site-packages\calibre\gui2\keyboard.py", line 640, in restore_defaults
File "site-packages\calibre\gui2\keyboard.py", line 262, in restore_defaults
KeyError: u'CSScm2em_css-cms-to-ems'
Did a 'Uninstall' and 'Install'. Is there a file I should delete to make sure?
I did delete tweak_book.json and it made no difference. Still get the error on clicking OK