The Importer is installed with every version but is only available with an eval license or retail license - not the free license. I think support has to give you a registry key setting to make the option show up in the Tools menu. I'll ask them to reply.
The PowerShell plug in is available in the next release (5.0) coming next quarter. It is pretty cool, you can create SmartDL (and regular groups), update them, add/remove members, delete them, etc. It also includes the ability the modify WebDir group settings (private, public, etc.), which is why it is only available in the new release (it requires changes to some of the backend stuff).
--Robert