We are working really hard for the improvement of Uploader theme and your suggestion are really important for us. Please make sure that you write feature request in detail and do not forget to share a wireframe, video or link of your inspiration.
Im going to delete this thread
So the problem is from the theme or from wordpress??
Please replace the attached file in wp-content\themes\uploader\includes\thirdparty\exc-framework\core
Add files support for pdf, doc, excel, ppt, rar format also.
I hope it will be very useful to everyone.
Also you are also getting many requests which were there in themeforest comment section.
The support is available and you can have a simple solution after your purchase.