I have done a search, but cannot find my answer, though possible hints at the right answer.

How often does the RL get a DVD update?

Some threads seem to hint at once a year, perhaps about October/November time frame of the new model introductions to the show room, but I cannot really tell. I guess there has been only one year of history.

 

I, too, have read once a year, in the fall. You can check the update history on ownerlink, I believe...