You need an empty row after a setting in settings.ini for it to take effect. i. e. press enters after the last line. The parameter MaxCurSelEntries is optional but can be used to increase the number of actually selected entries to be captured in the log. The default value is 6.
Restart the Engine service and Service Dispatcher.
Make selections on an application in the hub.
Go to C:\ProgramData\Qlik\Sense\Log\Engine\Trace and look for a ServerName_Audit_Engine.txt.