[henrypartridge]

I organised my Calibre library, correcting mistakes on downloaded books (eg author and title reversed.) Then backed up to an external hard drive. Now my library has totally reverted to the uncorrected version and when looking in the Calibre Library folder all the books are as downloaded from the internet. What have I done wrong, can I correct it without starting from scratch.

If I have to start from scratch can I back up in the format that i want to keep the library in?

Any help gratefully appreciated.