You must own a prototype in order to delete it.

Please note that once you delete a prototype, you can’t restore it, and we can’t restore it on your behalf. But if you’re still ready to delete a prototype, here’s how you can do that:

1. Navigate to your prototype homepage. 
2. Click ••• next to Assets under your prototype name.
3. Click Delete Prototype. 
4. Check all of the boxes to confirm, then click Yes, Delete This Prototype.

Alternatively, from your main account dashboard, you can hover over the prototype thumbnail, click •••, then click Delete.