all you need are your login details for the xara.com account that you purchased it with

you can then download the program at home and activate it - activating pro+ does not require a key, only that you log on to your account

once installed it will activate automatically if you are already logged on to the account you purchased it with at xara.com; it will ask you to log on if you are not [you do not need to stay logged on once activated]

you will be able to do the same later at your other location