You can upgrade your license at any time to use the plugin on more sites.
If you’re on a monthly or annual subscription, you can enjoy a proration discount for the unused time from your previous plan – Proration from a Subscription (Monthly or Annual)
Log in to the Freemius Buyer Account here – https://users.freemius.com/login
Navigate to the “Licenses” section, select your subscription, and in the right sidebar, use the “Upgrade to…” dropdown to choose a new subscription (refer to the screenshot).
