Menu > Playback > Restore last played folder on startup - alone - does not seem to work - no folder open.
That seem a fail. The below are confusing.
Menu > Playback > Restore last played folder on startup > Resume playback on startup is also selected; then the folder opens at first file. Play press plays the correct file - may be far down the list.
Menu > Playback > Restore last played folder on startup > Resume playback on startup - only - will open to correct folder and file position.