UPDATE: The http://docs.diladele.com/tutorials/regenerate_ssl_certificates.html shows all steps required to regenerate SSL certificates in latest version of Diladele Web Safety.
Please be sure to change the default certificates that come with installation package of Diladele Web Safety to something more unique for your network. Do NOT use password when generating certificates, otherwise Squid will not be able to use them! The following commands are for Ubuntu or Debian, adjust for your OS of choice accordingly.
$ openssl req -new -newkey rsa:1024 -days 1365 -nodes -x509 -keyout myca.pem -out myca.pem
$ openssl x509 -in myca.pem -outform DER -out myca.der
$ sudo cp myca.pem /etc/opt/quintolabs/qlproxy/
$ sudo cp myca.der /etc/opt/quintolabs/qlproxy/
Diladele Support Team
Here is the link why you would need to do that 🙂