Only members of the Site-Admin Group can add Paid Add-ons or Applications to the instance
Install Plugin
To find new apps, navigate to Jira Settings > Apps > Find new 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 are now subscribed to the app