Quote:
Originally Posted by BetterRed
@Ausbro -
My experience over ~3 years and 100+ upgrades is that all data is always retained.
BR
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+1
For most cases, calibre only updates you preferences when a NEW feature requires it. In a very few cases, some SETTINGS get glitched
IMHO Keep a backup of you Configuration folder (Preferences: Miscellaneous:click the button. Backup All files and folders there.
You will NOT always be able to reuse (restore) All files, but in many cases someone here can suggest which SINGLE file to restore