===== Switch to standalone (Single-Computer) Licensing =====
This can be helpful if you are going to have extended time off the internet.
Or if you have an expired eval that you want to run as a viewer.
Here's how to add a standalone (Single-Computer) license to Rhino:

==== From An Open Rhino ====

If Rhino is already installed and is getting a license from a CloudZoo, you can:
  - In Windows Rhino, go to **Tools** > **Options**.(Mac: From the **Rhinoceros** menu, click **Preferences**)
  - In the **Options** dialog, click the **Licenses** page.
  - Click **Change your license key**.
  - In the Licensing dialog, enter your license key.
  - In the lower-left, select **Options** and **Use only on this computer**, then click **Continue**.

Rhino will then enter the Rhino key and validate the license online if you have an internet connection.

====New Rhino Install====
If Rhino is not licensed:
  - Open Rhino and display the dialog //"Rhino needs a license to run."//
  - In the lower-left, select **Options** and **Use only on this computer**, then click **Continue**.
  - Enter your Rhino key.
Rhino will then enter the Rhino key and validate the license online if you have an internet connection.
====Troubleshooting====
If Rhino does not open, and allow you to pick a license method, you can reset the license keys manually.
Then Rhino will open with the dialog "Rhino needs a license to run."
To reset your Rhino keys:

=== Windows ===
  - Use your Windows file Explorer and browse to: //%appdata%\McNeel\Rhinoceros\6.0\License Manager\Licenses//
  - Delete everything in that folder
  - Browse to: //%programdata%\McNeel\Rhinoceros\6.0\License Manager\Licenses//
  - Delete everything in that folder
  - Start Rhino and login again

=== Mac ===
On macOS, the license files to delete are:
  * /Users/<USER>/Library/Application Support/McNeel/Rhinoceros/x.0/License Manager/Licenses/cloudzoo.json
where x.0 is your Rhino version. For example ...///8.0/License Manager///.

The Library folder will likely be hidden, but you can navigate to it using "Go to Folder..." (under the Go menu in the menu bar, or Cmd+Shift+G).