UPDATE This feature is now live.

Starred stories (stories you picked as "favorite") are now included in the My Stories export.

In the CSV export, the author information is added at the end of the story, for example:

19,朋,"companion",1,,"The story goes here. (★ story by CoolCat)"

The way it works currently, is to export one story per kanji. A starred story will be selected if there is no personal story for that given kanji. When there are 2+ starred stories, it's more or less random as there are no criterias to select one or another.

Let me know if there are any issues!

Thanks to rexto for the suggestion! Github issue #159.