When you purchase a license, you receive a product key. Standard activation requires an internet connection because the software needs to "link" your key to your computer's unique hardware ID to prevent piracy. Warning on "Free Keys":

Please note that I'm providing general information, and it's essential to verify the accuracy of the information and follow the official Letasoft guidelines for obtaining and using the offline activation key.

If you find the activation process too restrictive or the software outdated (it hasn't seen major updates in some time), consider these modern, often free alternatives:

If you want legal alternatives, I can: