welcome to the formum
Auditing is a feature of 6.2 and not available for 6.1.
But an upgrade from 6.1=>6.2 should be easy, there are only compatible changes.
You might use the standalone/domain config files from 6.1 with 6.2, that will run but the new features are missed.
Other option is to compare the config and add your changes to the 6.2 configuration.