In Configuration > My System go to the 'Subscriptions' tab:

This tab allows you to view various pieces of information regarding the performance of your Opsview Monitor software, including

• Number of hosts / services / collector servers

• System UUID

• Product name

• Software key expiry date

• Expiry date of each feature (if you have purchased the Network Analyzer module separately, etc)

Aside from displaying information about the active software key, you can also add a new software key via this page by simply clicking on 'Add a Software Key', which will load the standard activation page as below:

To manually activate a new Software Key or for more information please navigate to your 'https://[YourServer/activation/manual' and follow the steps.