I installed some plugins using the plugin manager, which eventually took me to: http://jenkins.example.com/updateCenter/
Go back to the top page (you can start using the installed plugins right away)
I don't think "top page" is a term Jenkins generally uses.
The trivial fix is to call it "Dashboard" as everywhere else.
The nontrivial fix would be to think of a new term and apply that consistently, IMO Dashboard View Plugin makes "Dashboard" for the regular index page ambiguous.