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 locked for use. The locked features 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 to make all the locked features available, click Upgrade.

For more information, refer to the PTC Mathcad Prime 5.0.0.0 Installation and Administration Guide.