I had a fully functional confluence instance set up with a fully functional team calendar. But when I went to install the team calendar plugin into Jira, somehow the confluence plugin stopped working and I was unable to disable it or re-install it via the web based management utility. Now I am unable to neither remove nor re-install the team calendar plugin. AND I have important events on several calendars set up which I don't want to loose.
The team calendar is the focus of my use of confluence so it is pretty critical.