If you are a current customer, you can purchase again to renew your access to the software for another year. As long as you use the same email at purchase that you currently use to you'll keep the same account and have access to your existing data.
NOTE ON PRICING: Prices on MaxiFi products have not changed since 2021 although, as of November 2, 2024 there will no longer be a renewal discount price. Each product has just one price, the same for renewing as it is for a new purchase. This cost adjustment option was chosen instead of raising both the original purchase price and the renewal price.