Post your query on item discussion forum so that the author of the file will guide you.
Thanks for your contribution to the Great Community and Best of luck for your Future.
Take a look here also: https://github.com/paulund/Wordpress-Theme-Customizer-Custom-Controls
I can not find Upload image control here.
This month would be biggest sale for me
Good luck and I suggest you one thing, you do not worry about rejections, we all face them even now also.
No one knows it?
It seems few top authors are using it.
Can you give me any resource URL to add button to media uploader, instead of system files every time.
Thanks for sharing