If you still have your pro installer you can use that. Pro support, as mentioned many times on forums, lasts for 6 months only, only since September last year did they offer an alternative 12 month pro support & free updates. During last 30 days of support, they email you warning you of pending end of support & offer a discount to continue support. If your support has finished then you need to re-purchase Pro, else, get LW Basic. To check if still support, go to LW site, click on Support page, you will see a link for Pro users.
Type in the email your originally purchased pro with.