Well I'm currently running CB15 program on 2 devices. Recommend you check with CB support though.
Chessbase 15

Anyone having trouble with activatin
g chessbase 15. Install went good. Can access playchess, Can use megadatabase. But not update chessbase program because it's not activated. Admintool is displayed and asks tot enter key and security code twice. Program runs, get message tot double click on database but program isn't activated. (Windows 10). Why?
How many licenses is there if I buy Chessbase 15 Mega package? I do not find any number...
Thanks in advance!