While the plugin is "abandonware" (no longer sold or supported by Red Giant/Maxon), it is not freeware. Distributing cracks or keygens is illegal software piracy.

Instead, use the or download the free trial of Optical Flares .

But here is the problem every designer runs into:

Knoll Light Factory: Is There a Free Download? (Legit Options & Best Alternatives)

Before you click that shady "Download Now" button, let’s talk about the reality, the risks, and the smart alternatives. The short answer is No.