The old keystore is backed up in the backup directory in the install directory. The keystore location is defined in the
server.xml in
/<install_directory>/apache-tomcat/conf
.....
keyAlias="WADE"
keystoreFile="/opt/CA/Web_Client/apache-tomcat/conf/.keystore"
keystorePass="some_pass"
/>
.....
Copy the old keystore and replace the new keystore.
Restart the Web Client and connect again via the browser.