If my Self-Signed SSL certificate has expired, I would have to generate a new certificate. I would perform the following steps to generate and use a new Self Signed Certificate:
* I would generate the new Self-Signed SSL certificate
* After generating the certificate, I would import the certificate into the Truststore
* Finally, I would update the required configuration files with the Truststore and keystore paths
You can take a look at the [Obtaining and Installing an SSL/TLS Certificate](https://community.denodo.com/docs/html/browse/7.0/platform/installation/postinstallation_tasks/enable_ssl_connections_in_the_denodo_platform_servers/obtaining_and_installing_an_ssl_certificate) section of the Denodo Platform Installation Guide for more information on steps to install the self signed certificate.
Suppose if you still need help and if you are a valid support user then you can raise a support case on[ Denodo Support Site](https://support.denodo.com/) so that our support team can help you
Hope this helps!