Hey Trumpeter.. it seems like you’re not fully understanding what’s happening with these filters. ‘download’ in my example is the post type you are posting to, not the custom field.
I’m definitely using ACF Pro for this too.
A lot of people seem to be struggling with this, so I wrote a tutorial explaining it in more detail.. check it out:
http://thestizmedia.com/front-end-posting-with-acf-pro/
