Is it possible to upgrade my purchased lifetime license from 1 site to 3 sites or unlimited sites so that I only pay the difference between plans or do I have to pay the full amount each time I upgrade a license (so if I first get the 1-site license, I pay $129.99, then upgrade to the 3-site license, paying an additional $339.99 and later on upgrade to the unlimited sites license, paying $499.99 more, for a total of $969.97)? If it’s the latter, why should I upgrade my license at all, why would I ever do that instead of buying a new one?
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