Setup

By default nexl server listens on a [localhost:8080] interface. If you need to change that, stop nexl server and edit the following settings file:
${HOME}/.nexl/app-data/settings.js
For Windows:
%userprofile%\.nexl\app-data\settings.js
Find there a http-binding and http-port keys and set appropriate values. Save that file and start nexl server.

You can also achieve that via GUI in [View] -> [Settings] menu.