Each spreadsheet comes with an automatically generated license key. The number of domains (i.e. users) a license key can support depends on the spreadsheet version purchased. If your license key was not automatically created at checkout or if you wish to generate a new license key to replace an existing one, you can do so on your account page.
Click on “License Manage” next to your order:
Under “Key Generator”, click on the “Generate License Key” button:
The license key is now created and will appear in the license key table located above the generator. You can now copy paste it in your spreadsheet (see “How do I register my spreadsheet?” question for more details)
Note that if a key was already generated previously, you will need to delete that key first before you can re-generate a new one.