From what I can see, Samsung provide 5 client licenses for free. So you should be OK. I am running MagicInfo-I Premium on my 7 DXn units and they are just fine. You need to download the software from http://www.samsunglfd.com but you also need to register as a business partner on that site. To do this, you need to know a representative from Samsung, otherwise the initial status of registration is very minimal and won't be able to download the software. If you have problems, let me know and I will send all the versions to you.
Bill