We renewed our credentials this year but the certificate link in LEED Online did not update automatically. After using the SC box for a few projects, I asked how to deal with this problem. USGBC answered the same business day - but I'm not surprised I didn't find this myself!

Within LEED Online there is a dropdown menu next to your user name. Select "Credentials". This takes you to a menu which allows you to trash your existing certificate and/or upload new certificates (from your computer.) Be sure to download your current certificates from USGBC so it's on your computer!