Where can I buy upgrades?

All the upgrades are optional - All the features advertised including unlimited usage.

Here is a breakdown on what you get access to with each product so you understand the value being offered:

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Upgrade #1 - AvatarBuilder Elite http://www.avatarbuilder.com/l/elite/
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New 3D Avatars Monthly For 1 Year (One-Time Price): Brand new customizable 3D avatars added to your account each month for 1 year (no monthly fees).
5 New Premium 3D Avatars Unlocked Immediately
Premium Text Effects, Animations & Fonts
Premium Stock Image / Video Asset Library
Unlimited Background Removal
Premium Slide Transitions
200 Premium Music Files Library
VIP Customer support
Premium Rendering Amazon Cloud Server

Priority Video Rendering
Priority Access To Future App Updates

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Upgrade #2 - AvatarBuilder Agency http://www.avatarbuilder.com/l/agency/
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Double Your Video Length (12mins)
1080p Video Renders
Ready Made HUMAN Voice Overs For All Templates
Convert Any Audio To A Stunning Video With Speech-To-Text transcription.
Save the CUSTOM Avatars You Build - Reuse Customer Designed Avatars For Future Videos.
Done-For-You Video Agency Package - Comes with done-for-you sales video, business cards, brochures, flyers, ready-made emails, invoices, letterheads, client contracts and a whole lot more!
Done-For-You Client Contracts
5 Extra Accounts For Virtual Workers & Family
150,000 Video Scripts & Articles (create videos on any topic or niche with ease!
Step-By-Step Videos On How To Sell Videos For Top Dollar

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Upgrade #3 - AvatarBuilder Template Hub http://www.avatarbuilder.com/l/templatehub/
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Brand New Video Templates From The Hottest Niches Added To You Account For 1 Year (No Monthly Fees)
Unlock 500+ New Templates Immediately (50 per category)

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Upgrade #4 - AvatarBuilder VoicePro http://www.avatarbuilder.com/l/voicepro/
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Unlock 100+ Premium Male & Female Text-to-Speech Voices In The Most Popular Languages and Accents.
Instant Download To 400 Human Voiceovers on Hottest Niche Topics. Can Download The Voice Overs And Use it in Other Video Apps.