Install Cross on backup laptop and main laptop ?

Hi there
Have searched but can't find a definitive answer ...
I have a main laptop with Cross installed.
Can i also install on a second laptop for backup use with the same license key?
Or do I need one license key per laptop ?
Both laptops need to be licensed and working at the same time as I take them both out, one is a redundant backup to the main laptop. If one fails I just hit play on the second laptop and fade it in on my mixer.
Thanks -Paul M
Have searched but can't find a definitive answer ...
I have a main laptop with Cross installed.
Can i also install on a second laptop for backup use with the same license key?
Or do I need one license key per laptop ?
Both laptops need to be licensed and working at the same time as I take them both out, one is a redundant backup to the main laptop. If one fails I just hit play on the second laptop and fade it in on my mixer.
Thanks -Paul M