Fabrik 3.8.1 has been released. It is mostly bug fixes and feature enhancements, but does include two new plugins (push notifications, and the sequence element). As usual we strongly recommend testing the new release on a sandbox if your application is mission critical, and always do an Akeeba backup before updating.
If you copy a list this will create a new list linked to the same DB table.
If you want create a new list with a new DB table but with an existing list/form/elements structure use the "content type":
Go to the form listing
Click "Export" on the form you want to "duplicate"
This will create a file form-name.xml with the structure of your list/form (groups, elements, validations...) stored in your-site/administrator/components/com_fabrik/models/content_types
Create a new list, set label and table name, Save
Select the content type you just have created, Save+Close