[Plugin: NextGEN Gallery] Using NextGen Gallery with post_thumbnails tag

I want to know if there is a way to use the new post_thumbnails functionality with Nextgen gallery images, so I don’t have to import images to the WordPress Media Library and have unnecesary duplicates.
The solution I had found so far is to upload my own thumbnails to WP Media Library for each post and page, but I would prefer to do it all with this plugin

https://www.ads-software.com/extend/plugins/nextgen-gallery/