It only works with Download Monitor. What do you mean by ‘huge number of queries’? Like SQL queries to the database or something else? I have never heard of anything like that and can’t think of how that might happen…
Are you running the latest version of Download Monitor (you should be running version 1.9.5)?
When are you seeing all these queries .. like on any page request in WordPress or only when viewing a page with the EBD shortcode on it or when you’re logged in as admin and in the Download Monitor section of the wordpress menus or…?
Where are you seeing these queries? Are you running a monitoring tool and seeing them or are you seeing errors/warnings showing up in an error log somewhere or..?