In Mach4, go back to and click "Load License File" .

Save the emailed file (usually named Mach4Lic.dat ) to your desktop.

The server will generate a personalized, encrypted file and email it to you. Install the License :

Mach4 Hobby license install issue and solution........ - Mach3

Without a valid license file, the software runs in , which allows full functionality but only executes G-code for a few minutes at a time. How the Licensing Process Works

Enter your (provided via email after purchase) and the PC ID you copied earlier.

Select your saved file. Once successful, restart the software to remove the demo limitations.