With PTC Mathcad Express, you can try out the basic features of PTC Mathcad Prime before you purchase a licensed version of the product. Premium features of PTC Mathcad Prime are still locked, and are marked with a lock icon. An indicator bar beneath the Ribbon shows that you are running PTC Mathcad Express.

To purchase a license and make all the locked features available, click Upgrade.

To activate a newly acquired license, click Activate.

For more information, refer to the PTC Mathcad Prime 8.0.0.0 Installation and Administration Guide.