Blackmagic Design offers two versions of DaVinci Resolve. If the software is asking for an activation key, you have likely installed the DaVinci Resolve (Free):
Websites or videos claiming to offer "free fixed" keys or "cracks" for version 15 (or any version) pose significant risks: Davinci Resolve 15 Activation Key Free Fixed
This version costs $295 and includes advanced features like the Neural Engine (AI tools), stereoscopic 3D, and advanced noise reduction. It requires a 20-digit activation code or a physical USB dongle. Risks of "Free" Activation Keys and Cracks Blackmagic Design offers two versions of DaVinci Resolve