I hate the OP has had this issue, but I thank him for bringing this to our attention. Is AP within it's rights to deny coverage? Most likely, yes. Is it a questionable customer service approach to deny coverage in this instance? I think so, particularly if it is accepted by all parties that the game was HUO.
I was thinking about AP game #2 but this post has impacted that thinking. Stern and Spooky have been great with customer service for me and I understand JJP is similarly good. With the variety available now to consumers, I'm personally not inclined to drop that kind of change on a game and worry about it not being supported on day 91.