The Flight Data Display in its own window, with a one-time setup that gets everything else ready for you. It is the same display as in your browser, so updates to the display arrive by themselves.
The official sector files, kept up to date each AIRAC by AeroNav. Install it first, then install FDD for Windows (or the plugin by hand, below) and follow the install guide.
Open files.aero-nav.com/EXCXOYou can still use the display in any browser at vnaaats.com/fdd and install the EuroScope plugin yourself.
Please report problems at github.com/garythms/vatsim-NAAATS-v2/issues. Source code: github.com/garythms/vatsim-NAAATS-v2.