Originally Posted by wn1ytw
I had that issue with OSX 10.8.5 and both calibre 1.2 & 1.3/ I used time capsule backup to restore my calibre preferences file so I could start calibre.
File "site-packages/calibre/gui2/main.py", line 234, in initialize_db_stage2
File "site-packages/calibre/gui2/main.py", line 183, in start_gui
File "site-packages/calibre/gui2/ui.py", line 204, in initialize
File "site-packages/calibre/gui2/actions/__init__.py", line 142, in do_genesis
File "calibre_plugins.marvin_manager.action", line 126, in genesis
File "calibre_plugins.marvin_manager.action", line 257, in init_options
File "calibre_plugins.marvin_manager.annotations_db ", line 303, in connect
OperationalError: unable to open database file
@wn1ytw, that bug was fixed with the 1.0.1 release of Marvin XD. Please update to the latest version of the plugin (available to download from the first post in this thread or through calibre).