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Mach4 Software Licensing

This guide provides step by step instructions for licensing your Mach4 CNC control software. If you have not already done so, it is recommended to complete the Mach4 Software SetupMach4 Software Setup and Mach4 ConfigurationMach4 Configuration guides before continuing with licensing.

Obtain License File

Follow the steps below to obtain your Mach4 license file:

  1. Locate your Mach4 Registration Code. This is provided to you by Avid CNC via email after your purchase of Mach4. If you need a Mach4 license, they are available at Avid CNC.
  2. Navigate to


  3. Enter your registration code, click "APPLY CODE", and then click "PROCEED TO CHECKOUT".


  4. On the next screen, fill out the required information. You will create an account with ArtSoft; it is recommended to save this account information in the event you need to obtain a new license file. In the next step you will retrieve the PCID license information that is also required.


  5. Open Mach4 and navigate to Help > About.


  6. Click "Copy ID To Clipboard".


  7. Return to the Mach Support window. Paste your PC ID in the field shown.


  8. You can now complete the checkout process. You will receive an email within about 2 hours from with a link to download your license file. Click the link in that email to download the license file (it is recommended to save the license file to your desktop) and proceed to the next section.

Install License File

Follow the steps below to install your Mach4 license file:

  1. Open Mach4 and navigate to Help > About.


  2. Click "Load License File".


  3. Select the "Mach4Lic.dat" file that you downloaded in step 8 of the previous section.
  4. You will see a message window that your "License file installed successfully." You can now restart Mach4.
  5. After you restart Mach4, you can open the "About" window again to check the license is properly loaded. You will see "Licensed" at the top of the window.


Now that you have installed, configured, and licensed Mach4, continue to the Mach4 Users Guide for an overview of the Avid CNC Mach4 screen.