As I read it, this is due to the plan to change the product activation system and its "phone home" about which many people have said they are unhappy. I assume that this is "hard wired" into the poser exe to make it difficult to hack, so if they change this it will probably require a new Poser exe, But this is just my guess, and what happens to poser installations if they are not updated, well that's anyone's guess.