
Today I more or less stumbled into a solution, that I would like to share

1. Copy the rich text outline in Word to the clipboard and paste it in an open Freeplane mindmap (I had the all new Freeplane 1.3.11).
2. Save in Freeplane/Freemind format (*.mm) and/or export as OPML file, import it into Scrivener, done.
Works on Mac and Windows alike.
Christian