In November 2014 we replaced BTD5 Deluxe with a version of BTD5 on Steam.
All Deluxe owners have a free Steam Key waiting for them attached to their order. If you have not received this please contact us from the email address used to purchase the game (if you no longer have access, let us know and we can figure things out)
Deluxe will no longer be receiving updates, but if you need help with your serial key or download please get in contact with us. Remember to give us your order number and any other info that can help.
There are other help options for Bloons TD 5 Deluxe available here