As an aside, when this question/discussion was moved from where I initially asked it, it was moved into the Mac & Windows forum. I have a PC, not a Mac. Does that make any difference with this problem?
... but when I go to open the route on the nuvi, the information doesn't seem to be there. When I go to Trip Planner, which is where I always used to go to access routes I'd made on MapSource and saved, opened with BaseCamp and sent to the nuvi67. Now there are no saved trip, and I have a seemingly endless "working" symbol - the circle in the middle of the screen going round and round and round ....
Where is my route hiding?