I suppose you have a working subscription ? Your enigma2 macadres should be fill in your dashboard. Thats the macadres it appears when you open the plugin or ask your reseller to do so for you
Login to your dashboard ==> manage lines ==> Add Enigma
Or ask your reseller to do for you
If you have only 1 connection you can connect only one one device. When i close my plugin i can use it on other device. But you make sure one connection is fully closed before opening on other device
Slight funtionality differences. Mainly the mac address validation in xtreamtv and auto plugin updation. If you have only 1 connection then with xtreamtv you wont be able to use other apps or plugins as the line will be dedicated on xtreamtv plugin.