Yesterday I accepted for using a new look for my project view (Agile) on JIRA on demand . A new nice left bar shows with some items (backlog, active sprint, reports).
Today by mistake I hit that I wanted back to previous look and my menu disappears, I was looking how to get back my new view but I don't find how. I saved a link when I have that one active and see that was using this add-on key com.atlassian.jira.jira-projects-plugin. I checked and the add on is still there and all modules as well, but this link is now giving me a 404 error and I don't see a way on how to activate it back.