Question where is my license key?and my dns-server?

[admin777]

Hello Plesk,
I want to start plesk server on apache2 but it doesn't work.
I need an older plesk for Linux the Problem is I lost my licensekey
didn't enter it, both!
So with phpmyadmin was installed and the guy in ubuntusupport tells me that is a quest for the support of plesk.

thank you all together!