updating security certificate

My current certificate is about ready to expire. I renewed the
certificate and downloaded it. I now have the p7b file to import. I
open ConsoleOne and select the object, Certificates tab, Public Key
Certificate. But it does not contain an Import button. Is there a
method for just updating an existing certificate, or do I need to
delete and recreate the object?

Regards,
Ken Etter

Novell....it does a server good!