-Edit- I'm not actually sure this applies with iOS.. Sorry if it doesn't.
That option is for Mac only, not iOS. When YoYo added that option, they only added it to Windows, Mac, and Ubuntu. For that option to work in iOS and Android, there needs to be on-compile modifications to the product's manifest and other file handling routines for compliance, something YoYo isn't willing to handle as of the time of writing.
I would love to see extension-level support for these kinds of file access, though.