Each Sticky Password license is valid ‘per user’. This means that you only need one license to use Sticky Password on all your devices. Just add another Trusted Device to your StickyAccount and your license info will be imported automatically. (Note: all of the Trusted Devices associated with a StickyAccount share the same encrypted password database.)
(Earlier versions of Sticky Password offered ‘offline’ licenses that were not connect to your StickyAccount. These license were ‘per computer’: a new license was required for each of computer.)