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Is it possible to include the "Size" column or other columns when exporting to "just index"?

Esta valoración es de una versión anterior del complemento (14.0.1). 

Thanks for the review!
Currently the fields exported are fixed. I think I know what you are asking for, however, some clarification is needed for this.
Can you post an issue in the repository where we can discuss?
https://github.com/thunderbird/import-export-tools-ng/issues
Christopher