Hi Honeytree,
You only need one license key to activate LR on 2 computers, so you can use the same license key to activate LR on another computer. Please make sure the other computer as the latest LR version installed and is not version 1.6.
All BrillKids learning systems may be installed on UP TO 2 computers, which means you can use your license key two times to activate your installations on two different computers.
If you have installed two times already, or in case you have reformatted your computer, you can manage your activation records and simply delete one of your activations to free up a slot for your other computer.
For instructions on how to manage your activation records, kindly refer to this page:
http://support.brillkids.com/index.php/article/manage-activation-recordsWe hope this information helps!