You can extend your evaluation using the steps below.
Click Browse > Confluence Admin
In the Configuration section, click Manage Plugins
Select LaTeX Math
Click Edit next to License key
Delete the existing evaluation license and click Update
The Free Trial button should be available again. Click Free Trial to get a new evaluation license and enter this license in the License key field
If you need advice on how to get the most out of our products or have suggestions, don't hesitate to contact us!