Attached Link: http://www.ultrafractal.com

I'm not sure what you mean by 'extra', but here is the pricing structure on the UltraFractal website:

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Upgrade from an earlier version

If you already own a license for Ultra Fractal 3 or 2, you can purchase an upgrade to Ultra Fractal 4 for a reduced price. Your online order will be processed on a secure server to protect your privacy.

Ultra Fractal 4 Animation Edition
Users of Ultra Fractal 3 or 2 only   $69 (US)          
Ultra Fractal 4 Standard Edition
Users of Ultra Fractal 3 or 2 only   $39 (US

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New users

Purchase your copy of Ultra Fractal 4 online and start working right now! Your order will be processed on a secure server to protect your privacy.

Ultra Fractal 4 Animation Edition
New users only
   $129 (US)          
Ultra Fractal 4 Standard Edition
New users only   $59 (US)

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So if you are a new purchaser, you can get the UF4 ANIMATION Edition for the same price as an upgrade of the STANDARD edition.  Basically the difference between the two is the Animation capability.  You can read all about both and make up your mind at the above link.

~Viv

Fractals will always amaze me!