List file from different category

Hi, I had tried this plugin some time ago and I remember that i had difficulties with category management. But I liked this plugin and I hope something is changed.

Example:

i have category hierarchy:

-Category_1
- Category_1.1
--- Category_1.1.1
--- Category_1.1.2
- Category_1.2
-Category_2
- Category_2.1
- Category_2.2

Now, i remember that:

1) is not possible to bulk assign multicategory to multiple file. Right?

2) if i insert category visualization, is there a way to directly list display all files (category + subcategory etc ..). i remember that if i display a category i see only files in this category and the subcategory folders but not directly files into subcategory. Right?
Example: i want to list simultaneusly all files in category "Category_1.1" and subcategorys . is possible?

3) is possible to display at the same time files from different category? Example: list files from category "Category_1.1.1" and "Category_2.1". This is a feauture that i use a lot with another File Download Manager plugin and I couldn't do it with WP File Download.

Thanks and i hope that i'm wrong;)

Carlo