Navigate to https://www.mastercam.com/support/technical-support/drivers-and-utilities/ download and install the following: CodeMeter, Mastercam Activation Wizard
Once installed – Launch the Mastercam Activation Wizard
Select Online Activation/Deactivation
Select Activate a New License
Accept the terms and condition then click Next
Enter your License number & Activation code:
Verify your License information and click Next
Your Mastercam License is now active. You can now launch Mastercam 2019 or Newer.