sorry, I misconstrued your statement … homestudio is correct. I took your post to mean you were using the soft registration, not a dongle. You only need 1 dongle that you move between computers. As he said, you can install on as many as you like, but you have to attach the dongle to the one you want to use. Having 2 dongles doesn’t work as you have to go through de-reg/reg process in order to use the other dongle. Which takes way more time than just moving the 1 dongle.