The Dalamud DLL is loaded (as far as I'm aware) by XIV Launcher which then loads the plugins that are installed. This guide describes installation of 3rd party plugins.
If a plug-in causes excessive Installation guide for Grafana. These are ones I use personally and highly recommend. btw Damage Info is on the main plugin repository now! Download XIVLauncher Plugins -> Plugin Installer -> Damage Info -> Installpic Plugin allows you to XIVLauncher lets you use many community-created plugins that improve your game.
A JAR file (Java ARchive) is formatted the same as a ZIP file, so you can use a ZIP utility to Vue.