Many users can’t activate using the Automatic Activation process, as they have restricted access to the Internet due to a firewall, or they prefer not to license your PC this way. In order to assist these people we also provide a self-service website to gain “unlocking keys.”
The steps for Manual Activation are as follows:
1. Visit http://www.internetactivation.com. Select the desired language, and the following screen will be shown (note that the "License Number" is the same as a "License Code"):

In order for you to license your program, an Installation ID and License Number will need to be provided by you as in the dialog box below. You will get the Installation ID by running the License Manager Utility.
2. Start the License Manager utility by selecting "Activate" at startup, or by clicking on the Windows START button, then Programs, and navigating to the Orca3D menu, then clicking on the License Manager Utility. The License Manager Utility may also be started from the Orca menu, but note that any changes made to your license will not be effective until you close and re-start Rhino.
Select "Phone/Email License."

Your Installation ID will be displayed. Click on the Copy button next to the Installation ID, and paste it into the Installation ID field in the software activation center web page. Type in the License Number that you were given when you purchased Orca3D.

Upon successful input of both Installation ID and License Number, click the Continue button to access the final screen.

This shows the Unlocking Key for input into the dialog box back in the License Manager, below:

Enter the Unlocking Key in the Dialog Box and click the "Install License" button. You will be asked if you would like to register; if you do so, it will make it easier for us to help you with any license issues in the future.
Upon successful entry of the unlocking key, you will be able to use Orca3D. Note: You may check the status of your Orca3D license at any time by selecting About from the Orca3D menu in Rhino.

Obviously, the Activation Service will check the use of License Numbers to prevent copying! If the license number has already been used, you will see the following screen:
