Activating Trados 2019 on a new laptop

I currently have Trados 2015 installed in both my PC and my 'old' laptop. I am in the middle of getting rid of my PC and transferring everything onto a new laptop I just bought. I would like to activate the Trados 2019 license I have but would still like to keep Trados 2015 on my old laptop as I am half way through a few projects.

The licensing page says that if I activate the 2019 license I will deactivate Trados 2015, but I recall doing the same thing I want now for Trados 2011 and 2015 (i.e.I had 2011 on my PC and 2015 on the laptop because of client preferences for either software). How could I do this?

Many thanks in advance for your help.

Paola