The keyword "updated" is critical. Many public keys circulating on forums are for legacy versions. When you try to use them with a freshly downloaded installer, the software responds with: "Invalid license key" or "Key expired."
If you want an alternative, I can:
Paddle, the service previously used for billing, has reportedly ended its affiliation with MP3Studio. Risks of Using "Updated License Keys"
Do you prefer a , or are you comfortable using command-line tools ?