Assuming the native Windows 10 app:
- Open Settings (that gear thing down near the bottom left)
- Click Playback
- Select the Rewind Media Button dropdown and choose behaviour.
- You can also choose, on this page, to either Download or Stream by default.
Note in the playback area that there are two rewind buttons and two forward buttons. The circular one is what you control with the Rewind Media Button setting. the |<- one is rewind to beginning of current chapter.