Installation Guide
Only members of the Site-Admin Group can add Paid Add-ons or Applications to the instance
Steps
Click on the Settings icon and select Jira Settings > Apps

Search for Three Dimensional Date Gadgets and click on the result to view the details

Click on Try it free button

Click on Start free trial button to proceed with the installation

A popup will appear to inform you the installation is in progress

The popup message will appear in the top right to confirm the app has been successfully added

The trial license will be applied automatically. You can start using the app now.