Hi Marc,
with a single subscription , you are able to use the product on to Two new machines and they would work fine . In case if you really need to deactivate the product from the older machines, you can simply launch any one of the products , Go to Help button and find the deactivate option there . Deactivation of one software would deactivate the whole suite .
let us know if this worked fine for you or not ?
Regards,
Kartikay Sharma