I dont do this anymore because of different setups, but in the past, I was using my 2 activations in 3 computers, and anytime I went to the “third” computer, it would ask me for a key, which I entered, and worked away…later, if I went to the “first” computer, I would again have to enter the key, as the activation on #3, automatically deactivated #1. Activating #1 was going to automatically deactivate #2. It was just a wheel of activations. I kept my activation key handy on each machine, and didn’t worry about deactivating anything. Not sure if it still works this way or not.