No. Not unless it’s from an official RE:Vision partner.
If you have lost a legitimate registration key, RE:Vision Effects provides a specific recovery process: License Reissue : Users must purchase a "license reissue" item from the RE:Vision Effects web store Support Request : After purchase, you must complete the Lost Registration Key form
To activate your license, you can use the interactive GUI or the REVision Activate Command-Line tool.
He stepped out of the alley. He needed to get to the transit hub. Three blocks. But as he turned the corner, he saw the Enforcers. Two of them, heavy tactical armor gleaming under the streetlights. They hadn't seen him yet.