I currently have CS6 Adobe After Effects version 11.0.4 and I want to upgrade it since I worked on another computer and it has version 13.0.2 . How do i upgrade it?
Do you have a Creative Cloud Subscription or a perpetual license with a serial number? If you have a subscription, download the Creative Cloud app and install the latest builds providing your system meets the minimum system requirements: System requirements | After Effects
If you have a serial number then proceed to the Adobe Product page and click on the appropriate button: Creative Cloud pricing and membership plans | Adobe Creative Cloud. If you own a CS6 Suite check out the Special for CS owners offer. Here again, make sure that your system meets the minimum system requirements.