From my understanding, there were 3 products, BS1, BS2 Upgrade and BS2. If you purchased BS1 and didn't download the BS2 Upgrade, you have to buy BS2 with a serial #. I have BS1, do not have the upgrade but downloaded the current BS2, this doesn't work. I was informed of this from ED with my last open ticket. I can send the whole conversation with them if you'd like.