Ok, so my this past winter my uncle (he owns a production company) gave me a ******** of old mac software. I was just looking through it and there's a copy of AE 5.5. I'm trying to figure out of that means that I can upgrade it to AE CS3. Adobe's website is confusing though. Parts of the site says you can buy AE7 and then get free AE CS3, but i'm not sure if this is for upgrades too? What's my best option here?