UNITY 300 restore to defaults

Hi all,

I have just received a Unity 300 and I have some questions about it. 

I found we can restore to default the system switching controllers to service mode but I supose that procedure wipe out the license, isn't it?

As we are not the original customer I don't know if I can access to download license file. Is any way to obtain the license from system before restore it to defaults?

Thanks in advance,