While the software offers a trial version, an activation key is necessary to remove limitations. Remove Trial Stamps:

If the key fails, ensure your system clock is correct (expired SSL certificates are a common blocker) and that you aren't using a VPN that routes through a region where the license is geo-blocked.

Losing a license key is common. Here is how to recover it.

Do not treat it as a hurdle to be cracked, but as a tool to be respected. By obtaining a legitimate key through official channels, you ensure three things: