If all you need is the login parameters (publickey, biote id, shard, etc..) use whatever web browser you have to log in and get to the page where you'd normally click on 'Play Horizons'. The button will be disabled since the activex control won't be loaded, but that's okay, you don't need it. View the page source, and you'll find the info you need, stored in hidden form variables. (input type=hidden)