I've been using secure SIP for a while. After upgrading to 18.104.22.168 my cert and key no longer appear on the Advanced/Security tab of the management interface. Yes, I put them back after the uninstall of the previous version deleted them. They are in \bin\cert. The names have not changed (they worked previously) and are as specified -- domain_key_x.x.x.x.pem/domain_cert_x.x.x.x.pem. Did something change in this latest release?