Launch the application. You will see an activation window. Enter:

Click Activate Online (requires internet). Once verified, the “Full 23” features unlock permanently.

To repeat: searching for “download php lockit full 23 install” in hopes of a free full version is risky. You will likely find malware-ridden archives on board.phpnulled[.]org or similar. Instead:

Because you are reading this, you likely need a permanent copy. There are two primary methods for the "Full" version:

Let’s assume you’ve purchased a valid license. Follow these steps exactly: