Export Inbound messages developer not responding

Since Takayuki Miyoshi has completely bailed on helping with this plugin, I found another solution in the form of a different plugin. It is called Contact Form 7 Database Addon – CFDB7 at https://wordpress.org/plugins/contact-form-cfdb7

The only difference is that you can only export one contact form entries at a time instead of all of the entries. Have fun.