how to get the 'product key activation' instead of subscription...

I've looked through lots of posts, but can't seem to find the answer.  Non-technical user here looking for support to get the 'product key activation' for NIS (I bought a new CD version instead of renewing on-line) instead of the 'subscription' notice that seems to be the only option to update.  I used the 'RemoveSymantecMacFiles' tool but it did not get rid of the subscription...

 

Thanks in advance!