To Create a new Subject you must be in the DataPA Analytics Engine screen.

Ideally Select the System prior to creating a Link using the Tree view, this will preselect the System in the Wizard

THEN...

Click on the 'New' Icon in the Toolbar.

The Subject Wizard - Introduction form will then be displayed

OR ALTERNATIVELY...

Click on File (On the menu bar), and then click on New Subject

This will also open the Subject Wizard - Introduction  Form.