When you download Specops Command for the first time you get a Free license sent to the email address specified when registering. The Free license has no restrictions regarding the number of computers where it can be used.
When starting to use Specops Command with a free license it will work and behave just as the full version for a period of time (30 days by default.) After that it will enter Free mode. In Free mode some features are disabled.
The Full license adds a number of features that grants you the power to manage your organization in an automated way that previously was not possible. However even the Free license adds tremendous value compared to today’s logon and startup scripts, and give you powerful options not available without Specops Command.
The Full license opens the full feature set of Specops Command and has no expiration dates.
A full license can be purchased from Specops Software, a Specops Software Reseller or Partner. The full license uses a "per seat” model. That is, the price depends on the number of clients Specops Command will be used on.