database superuser password behaviour changed

database superuser password behaviour changed

Hi,
in  Version 12.1 (12110) the following change has been implemented.
Hereafter, the PostgreSQL superuser password will be auto-generated and encrypted for every new instance of Password Manager Pro and will be maintained in the 'database_params.conf' file.

My questions are,
- how does it work? 
- which encription key is used?
- where is the key stored?
- do I need to backup that key seperate?
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