From what I can tell, this (very much improved in many ways) new version of TBXML assumes all XML files processed will be contained in the application bundle. That is absolutely a show-stopper for my requirements as I use XML files for all manner of communication between clients and server - most of which are never located "in the app bundle'.
I will implement my own work-around but it would be wonderful if this capability were incorporated into the official source code.
Thanks much!