I Updated to wordpress 3.9 a couple of days ago. the installer and zip file are created successfully the problem for me is the database.sql file contains 0’s in most of the fields instead of the correct data.
I did manage to create my own database.sql file and add it to the zip file and successfully installed it onto another server.
Apart from this minor issue it’s been a awesome plugin and saved me loads of time deploying my site ??