As I said I use ADE to check formatting for epubs since many readers use ADE. I couldn’t use Calibre for that, but I do use it regularly. It’s a brilliant program.
I didn’t uninstall 1.7.2, so it’s still around and I can use it to check backwards compatibility, but I still need to use ADE 2 and it would be a whole lot less annoying without this dialogue box.
Adobe is such a shambling behemoth that I don’t expect my little complaint to change their momentum one iota, but sometimes it just helps to complain! 