Open admin drop-down and choose Atlassian Marketplace. The Manage add-ons screen loads.
Free upgrade is available for users with a valid Search Linked Issues license.
To upgrade Search Linked Issues:
Open admin drop-down and choose Atlassian Marketplace and the Manage add-ons screen loads.
Find plugin in a list of your installed add-ons and click the Update button that is displayed if an update is available.
Choose the cog icon at top right of the screen, then choose Add-ons and the left-hand side of the page select Manage add-ons.