Originally Posted by way8lifter
Hello...my calibre used to work fine...now it refuses to.. I cannot add books ,,,I cannot read books with its ereader .....I have uninstalled and reinstalled...any ideas??
2 things come to mind:
1) a recently added font is corrupt/the font Calibre was using was removed.
2)you have corrupted the settings.
Preferences: Miscellaneous: click the button labeled Configuration Folder..
Leave the folder OPEN and Exit Calibre.
Delete the folder (and contents)
Uninstall Calibre,then Reboot