i’m a bit confused by your question….
but, if you have an earlier version of ae and want to upgrade to version 7 (note that the latest version is cs3 also known as ae8), but you need to make sure you are purchasing the correct upgrade. there are different upgrade paths based on the version number (6 or 6.5, etc) and bundle (profesional/production or standard) of ae that you currently have.
you would need to check with adobe or read the packaging for requirements to see if it is the correct upgrade for the version that you have.
if you can upgrade to cs3 (ae8) there is only one version — proffesional. they no longer produce standard, and, they are not charging more to upgrade from a previous version of the standard ae. so upgrading to cs3 may be a better option.
all upgrades are complete versions (it’s not a patch or update), you just need to have a previous version of ae installed, or enter the serial number of the previous version to install the upgrade.