On October 1, 2017, Homeland Security discontinued use of their GOES (Global Online Enrollment System) and begin using TTP (Trusted Traveler Programs). This has or will affect persons holding Global Entry, NEXUS, SENTRI and FAST credentials.
If you have not already updated your account, you will have to re-register on the TTP site in order to renew or make any changes to your account (new address, new passport number, name change, etc.).
As per this October blog post, the process takes 10 to 15 minutes and involves 15 steps.
The process generally worked smoothly for me, after a bit of confusion on the Login.gov page.