Many issues, almost unsable

Hello,
this plugin does not work properly (definitely). I tried to move my old website posts to a new website with your plugin (so a totally blank database to assess which assets are being imported).
I checked the “Download and import file attachments” option but no attachments have been imported. Infact, I looked at the “wp_posts” table in the database of new website and it only had post_type “post”, no attachments.
So, if I wanna import the attachments, I should do manually: go to the old database, filter “wp_posts” table records which have “post_type = attachment”, download the .sql file and then import into the new database. Not a straightforward procedure and efficient way to move or simply copy a list of posts from a database/website to another one.
Do you expect to enhance the plugin? Do you expect to fix these issues?
Thank you.