3D FlipBook - Installing plugin key for jquery version

I've purshed license key for jquery version, but I don't know how to activate the key. I was using demo version without problems, but after replacing with pro version it stops to work with the message: Error: Setting up fake worker failed: "Failed to resolve module specifier 'js/pdf.worker.js'". Is this for missing license key in any place? Where I have to put it?