It's a one-computer license, but if you carry your dongle around with you -- -- then you could easily have multiple locations with the Amarra software in place.
The Amarra 4 has all or most of the ULN-8 functionality, and it has one or two tweaks that prevent consumers killing their speakers by having the gain unintentionally high. Anyway, there are 8 channels of analog in and 8 out (4 stereo pairs if you choose), and there are 8 channels of digital inputs/outputs also, so you could have 4 digital sources or two sources in and two receiving Amarra's digital output. The breakout cable I have is two AES in and two AES out. The Amarra 4 has a high quality analog volume control so you can use it as a true preamp as well.