The file path is appeongetcachedir() + '/config/aws$ini$.xml', for example: x9*7^^/sdcard/Android/data/com.appeon.mobile/files/1b726971/config/aws$ini$.xml

You cannot use fileexists to judge if the ini file exists or not for the Appeon web application. The INI Files tool determines whether the Appeon deployed applications would download XML files that emulate INI files to the clients for profile functions, or directly use the XML files stored in Appeon Server database.
Please refer to article below for more detail.
http://www.appeon.com/support/documents/appeon_online_help/2015/server_configuration_guide_for_net/ch04s04s04.html#INI_File_Settings