You can buy license for Plugin from Attlassian Market.
After you bought your license from Atlassian Market follow these steps to apply: ds
- Log in into JIRA as Administrator.
- Go to Administration section.You may need to log in again (we're super secure).
- Navigate to the Manage Plugins page of your JIRA instance (the Install section in older versions).
- Locate your installed add-on in the list.
- Click the add-on entry and copy and paste the license key into the license box for your add-on. All done!