have you registered the serial with stardock?
if yes, then look at https://store.stardock.com/myaccount/products
and log in with your email address and password.
if no and NOT stream version, then registerthe serial with stardock, and download the full install unless the installed version # is above 1.30 then you can download the update
if it was a stream version then stream should update automatically unless you have the autoupdate off.
hope this helps