This is available in the latest beta
See this thread:
thanks
Hi, I love your plugin, there is just one more feature i would like to see.
In file picker please allow export of just selected folder without its parent folders. Sometimes I would like to share with someone my notes with attachments but I would like to avoid cluttering the navigation tree with useless parent folder that are empty after export.
As an example, I would like to hide parent folders marked red and just keep the green one.
Sweet! 
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This is a feature in the beta version and is coming in the next stable release 