"Generate Site Index" has been removed since WebScrapBook 0.79.0 (and PyWebScrapBook 0.23.0). Conversion of scrapbook data from legacy ScrapBook (X) can now be done using the CLI tool of PyWebScrapBook. See changelog and documentation for details:
- https://github.com/danny0838/webscrapbook/blob/master/CHANGELOG.md#0790---2020-10-06
- https://github.com/danny0838/webscrapbook/wiki/FAQ#can-i-use-webscrapbook-with-data-made-from-legacy-scrapbook-x