get RWUser Data File
fun Tooling.getRWUserDataFile(child: String?, appName: String, appVersion: String? = null, appAuthor: String? = null, roaming: Boolean = false, createIfNotExists: Boolean = false): File
Get a read-write able file in the application user data directory (platform dependent).
Return
a File in a platform dependent user data folder.
Parameters
child
the child in the user data directory or null to get the root dir.
app Name
the name of the application which is used.
app Version
specify if the file is dependent on a specific application version.
app Author
specify if the file is dependent on a specific application author.
roaming
whether file should be created in the Roaming folder (Windows) or not.
create If Not Exists
create file if it doesn't exist.