To deactivate the NiceLabel license, do the following:
Start any NiceLabel 10 program.
Go to File > About and click Deactivate License. License deactivation warning window opens.
Click Yes to deactivate the license or Cancel to abort the deactivation procedure.
The single-user license has been deactivated and can be again activated on another workstation.
Another possibility to deactivate NiceLabel 10 is to uninstall it. During the removal process, you will be prompted whether you want to remove the license or not.