How to create Repeater fields using Advanced Custom Fields?

I’m using Advanced Custom Fields and trying to create a field with the field type Repeater.

But the problem is that the Repeater option doesn’t appear in the select list with the field types. I can’t figure out what’s wrong.

I’m using Advanced custom fields v3.5.3 and WordPress 3.4.2.

What could be the issue?

The Repeater field is a premium add-on, and you have to buy a licence key: