I have not used it for this, it is a web app and the learning curve is very steep. But a website called Furkot.com can plan a trip and then export it in a number of different formats. I have only just started using Furkot and some of the features are almost easter eggs, but they are in the help files - Which are real good. It is still a web app and we are often out of web access.
I am still working Street Atlas 2015, and I take the time to reload the drivers GPS with the next day's plan each evening. That may be a monumental PITA, but until something better shows up, that is what I will do.
Matt