To delete the license file from the system, do the following:

1. Launch the Activation utility (see Activation utility for Linux OS).
2. On the main page of the utility, select Deactivate.
   
   
3. Click the Next >> button.
4. You can save the activation request file using any one of the methods prompted on the screen.
   
5. Click the Continue button.
6. Confirm the deletion of a license file.
   If the deletion is completed successfully, a message is displayed.
   

You have deleted a license file. After deleting the license file from the system, the demo license is activated. To return to the main page of the utility, click the Continue button. To exit, click the Finish button.