[How to ONLY import American box arts?]

My whole collection is just a mix and match of various region box arts and it's very ugly. Is there any way to only download American box arts and images? I've tried the region priority tab and it didn't help at all.

[Excluding files from folder search]

Hi! I'm wondering is there any way to exclude files from being recognized by folder searching? I have many RPX Wii U files but they are in folders so it picks up hundreds of files instead of just the RPX. If not I can add them manually but I am just curious. Thanks!