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ownedbycats · 10-22-2021, 07:22 PM

Make sure to backup your metadata.db; there's some changes to the database structure and reverting to an older Calibre after it upgrades tends to cause errors.

I also suggest backing up the plugins folder from appdata; sometimes getting older versions of plugins is tricky.

Then upgrade. Don't be surprised if some of your plugins seem to disappear - chances are they just failed to load and got deactivated because they're outdated. Just re-download the newest version.

10-22-2021, 07:22 PM	#7
ownedbycats Custom User Title Posts: 11,024 Karma: 75555555 Join Date: Oct 2018 Location: Canada Device: Kobo Libra H2O, formerly Aura HD	Make sure to backup your metadata.db; there's some changes to the database structure and reverting to an older Calibre after it upgrades tends to cause errors. I also suggest backing up the plugins folder from appdata; sometimes getting older versions of plugins is tricky. Then upgrade. Don't be surprised if some of your plugins seem to disappear - chances are they just failed to load and got deactivated because they're outdated. Just re-download the newest version. Last edited by ownedbycats; 10-22-2021 at 07:24 PM.