Just updated to 4.0 now Calibre Freezes when trying to edit preferences
Now that I have updated to Calibre 4.0 the application freezes if I select the "Preferences" Icon.
Windows 10 64Bit Build 1903 on Intel i7-8700 3.2Ghz CPU 16BGB Ram.
I need to be able to update preferences. Can I reinstall previous version without loosing my library?
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