Log into your Confluence instance as an administrator.
Click the admin dropdown and choose Atlassian Marketplace. The Find new add-ons screen loads.
Locate Linchpin Theme Plugin via search. The appropriate add-on version appears in the search results.
Click Try free to begin a new trial or Buy now to purchase a license for Linchpin Theme Plugin. You'll be prompted to log into MyAtlassian if you're logged out. Linchpin Theme Plugin begins to download.
Enter your information and click Generate license when redirected to MyAtlassian.
Click Apply license. If you're using an older version of UPM, you can copy and paste the license into your Confluence instance.