[HELP] Divi Switch Pro 3.0.1 needs a valid license key

Hi I'm new around here and while looking for a problem, I came along this site and want to ask politely. I downloaded Divi Switch Pro version 3.0.1 it says full and contains a license file but when I activate the plugin, there is a activation page pops-up. I couldn't find any license key inside the folder or site that I downloaded. Anybody has suggestions for me? Much thanks