Hi jscottk, the thumbs-down and up gestures work better if you tilt them towards you so that the Leap sees more of the hand. Alternatively, you can use SPACE for thumbs-down (randomize) and S for thumbs-up (saving).
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Hi, thanks for letting me know that you are confused by that. Oculus apps only work on Windows, and the windows executable is of course contained in the ZIP, that's why I assumed it was clear (and I really had missed the Windows checkbox for the download file).