moving licenses from SL 4.5 pcs

We are in the process of upgrading two machines we have in our lab currently running Superlab 4.5. The pcs had issues activating their licenses via the internet initially so they were manually activated using the Cedrus Activation website (from another machine).

Do we need to de-activate the existing licenses before installing the new machines?
I had read that the 4.5 license file is visible and can be backed up. Can we do this from within Superlab itself or just manually copy the file from the Superlab folder? (if so how can we identify the license file itself?)

I need more information to be able to check your license status. I will contact you by private message.