Kodi 17.1 on ATV4 – is there a way to install/edit advancedsettings.xml

Is there a recommended way (or thread describing) detailing how to install or edit advancedsettings.xml? I’ve installed the latest Kodi test build using my developer account from my Mac – works quite well (thanks!) but have been unable so far to copy over advancedsettings.xml. The add-on “Easy Advanced Settings” is unable to write the xml file for me. I next tried using the file manager to mount a directory from my Mac – using smb://xxxx I get broken pipe errors when trying to mount. The core testing thread first post says that advancedsettings.xml is only available from the File Manager under the confluence skin. I’d be grateful if someone could point me at the right approach.