Hi, I cannot find ZSpheres anywhere! Can anyone help? I’ve tried everything I can think of- my version is completely up to date, I re-installed it, everything! I attached a screenshot of my tools menu. Thanks in advance 
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You’re looking in the Tool section of LightBox. You need to be looking in the Tool palette.
In you’re picture, you’d want to click that larger Cylinder3D icon in the Tool palette, to the right of the canvas.