I've had GE for 5 years (thank you to United's original credit program) and it expires this summer. As I do regularly travel to Canada, I planned to upgrade to NEXUS. I logged into the CBP website, which will let me renew my GE, but the option to add NEXUS and other trusted programs is grey'ed out. Anybody have any ideas?

Given the current NEXUS processing times, and my GE expiring in 3 months (July), is there any sense in just renewing GE first to ensure uninterrupted access, and then adding Nexus later? I doubt I'll be going to Canada often between now and then.