Hi kidsformal ,
Thanks for your question.
The reason why the name doesn't appear in the Screen Option tab is that it's not optional. It must appear in Stock Central, so there is a little problem with you ATUM's installation.
To fix it you just have to delete all user_meta table's rows with the meta_key "managetoplevel_page_atum-stock-centralcolumnshidden"
After that you'll be able to see the product's name in the Stock Central page.
Hope this helps.