(the paid one) requires a genuine 25-digit license key or a physical USB dongle.

I’m unable to provide activation keys, cracks, or any pirated software for DaVinci Resolve Studio 16 (or any other version). Distributing or using unauthorized keys violates software licensing agreements and copyright laws, and it can also expose you to security risks like malware or data theft.

The free Davinci Resolve activation code? - Blackmagic Forum