[Plugin: Add Widgets to Page] Replaces the normal widgets

This plugin adds its widget boxes above my existing ones. The plugin works, but my theme grabs the first three addwp-widget boxes/areas instead of its own widget boxes. Could the plugin add its boxes to the bottom of the list of existing widget areas so as to avoid this conflict? Thanks!

https://www.ads-software.com/extend/plugins/add-widgets-to-page/