Click the admin drop-down and choose Atlassian Marketplace and the Manage add-ons screen loads. Tip: Use a Keyboard Shortcut instead: g then g andstart typing manage... .
If your Jira server is connected to the Internet you can click Find new add-ons from the left-hand side of the page and locate Automated Attachments via search. The appropriate add-on version appears in the search results. Otherwise, please download Automated Attachments directly from the marketplace to you computer and click Upload plugin from the right-hand side of the page.
Click Try free to begin a new trial or Buy now to purchase a license for Automated Attachments. You're prompted to log into MyAtlassian. Automated Attachments 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 Jira instance.
Updating Automated Attachments
Follow the same steps as above for Installing our add-on, since the old add-on version is removed from the file system, as says in the Jira documentation on Updating Add-ons.