I would go to Tower Hobbies and download the T6XAs manual, it is close enough. The T6XA lacks a few things like 3 versus 6 models in the memory. But when it comes to EPA, EXP, Trim Memory they are the same. The instructions on how to program are essentially the same. Just remember the T6XAs has a few more bells and whistles in it.
You might try
www.futaba.com and see if they still have it up on line too. Tower Hobbies and Futaba are closely related.
Cheers,
Chip