I believe the NX 3 version is from the days before it became the commercial entity NoMachine. It is rather old, I think the newer version will be more to your liking. It is not difficult software but can be a bit overwhelming since there are so many options. You will just have to mess around with it to figure out what you prefer. Screen size/resolution, sound, printing, session status on disconnect, all kinds of options. All settings are configured with the software, so no hand editing of config files. You will get both the nxclient and nxserver on the install. If I recall properly, nxnode is not something you will need to interact with. It has the ability to have a proxy server to a host of backend machines (nxnodes) for large site installs.