No, BitRecover provides a lifetime license key. You only pay once, though major version upgrades (v5 to v6, for example) may require an upgrade fee.
The software is available in several tiers based on the number of machines and output formats required: Standard License (~$29 - $39): 2 machines bitrecover pst converter wizard key
If you are searching for a "BitRecover PST Converter Wizard key" on Google, you will likely encounter websites offering No, BitRecover provides a lifetime license key