You are not required to deactivate since you are allowed to have two activated installations. But if you do not want to have a backup installation available, then to deactivate it just open one of the applications and choose Deactivate from the Help menu. That will deactivate the whole suite.
To install on the new machine, just install it the same you you did originally. If you downloaded it originally then you might find a link for it in yoru Adobe account online. Otherwise you can find a link thru the following page:
Download and Installation Help -
https://helpx.adobe.com/download-install.html
If you remain unable to find a link then indicate which version of the suite you need and a more direct link can likely be provided.