It most certainly is still my property. They sold it to me, I paid for it. They have zero right to ask for it back. And sending an update to kill it is deliberate destruction of property which they do not own or have a right to destroy.
If people had the right to recall property, can a new and struggling artist sell you a painting for $100. Then 30 years later when he's internationally renowned and his paintings are worth millions, he can "recall" his earlier works by issuing a refund of your original $100? Once a sale is complete, the seller can't reverse it without the consent of the buyer.