Eclipse “Server Locations” section disabled and need to change to use Tomcat installation

Ok, sorry for my previous answer, I had never seen that Overview screen before.

Here is how I did it:

1. Right click on my tomcat server in “Servers” view, select “Properties…”
2. In the “General” panel, click on the “Switch Location” button
3. The “Location: [workspace metadata]” bit should have been replaced by something else.
4. Open (or close and reopen) the Overview screen for the server.