The KDD that comes with the Choice is definitely KDD 2.0.
You can check this in two ways:
1. If you download another hold (like 1LevelEZHold) from CaravelNet: are you able to upload high scores from the KDD client.
2. Does your version of KDD have secret rooms or voice acting? If it does it is KDD 2.0.
If you can't upload highscores from the KDD client, I'm not quite sure of the solution.
If the version of KDD you have is KDD 2.0 but that hold specifically won't upload highscores it sounds like it's what's mentioned in
that topic and you're probably out of luck. There might be some tricks that could be done, but it's kind of messy and I don't know how to do them or if it would work.
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If you need to think outside of the box, then you didn't build a good enough box.