full uninstall

Yes, this plugin leave junks (a lot of them) in DB on uninstall.
From this document page ( https://developer.www.ads-software.com/plugins/plugin-basics/uninstall-methods/ ) WordPress recommend you to delete those data.

When your plugin is uninstalled, you’ll want to clear out any plugin options and/or settings specific to the plugin, and/or other database entities such as tables.