Settings:
Config variable for sep and srl files: Civil_superelevation_rules_directory
Default location: C:\programdata\bentley\civil\standards\8.11.9\en\super
Workspace > Preferences > View Options Civil: Set the Superelevation Settings to "Fill"
Design File Settings: (Controls the number of decimal places)
Tools:
Located in Tasks>Civil Tools>Corridor Modeler:
Quick Step guide (follow the prompts):