Choose your feature set and level and you should be good to go.
You'll need a CCO account with a SmartNet entitlement to get the file. It's still licensed software and updated/upgrades are not free.
If you want a one-shot update/upgrade, partners like www.cdw.com also sell single licenses.
Good Luck
Scott
Getting Started
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: