I set a route the other day, it located my position about a mile from where I actually was, which was strange in itself. When I press the GPS locating button, it still believes I at that original location plus it thinks I'm going 0 mpg. I can change everything else.What do you mean it's "locked up"? It can't locate your position?
You don't even need to update. Just pull the card out (with vehicle off) and put it back in and start the vehicle back up. This will reset the nav. I've had the same thing happen in my CX-9.
Still would be good to update though if one is available.
Resetting the nav by removing and replacing the SD card will only fix it for the interim (if it even fixes location tracking). Been there done that.