During installation you'll basically be prompted to only set the target folder, but you can leave the default (under "Program Files").
The first time the program starts, it prompts you to set it to
automatically start at Windows startup.
You can configure this option at a later time.
Setup Figure 5
Move it
Drag the window, by keeping clicked the left mouse button, to your preferred position on the screen.
My preferred one is almost on the top right corner of the screen, just few
millimeters from the minimize/maximize/close buttons of other windows.
It shows network activity
There are two indicators to get network activity: the vertical bar graph and the values.
The graph shows at a glance what network activity was going on in the last couple of minutes.
The values indicates actual network usage measured in Kbytes/second giving both
upload and download values.
The green bars 
indicate that something is being uploaded.
E.g. when you send an e-mail:
The red bars 
indicate that something is being downloaded.
E.g. when you download a file:
And here's 
a mixed workload situation...
Set transparency level
By clicking with the right mouse button on the window, a context menu appears:
And here is how it looks after setting a 40% opacity...
Systray icon
Find it in the windows system tray, right next to the clock:
and disable/enable it from the "Show" submenu:
It can show only values
"Hey! I don't wanna see that clumsy graph!" ...then just hide it from from the "Show" submenu...
It can show only graph
"Hey! I don't care about values!" ...then just hide 'em from the "Show" submenu...
It shows actual values
By default actual values are displayed, which answers to the question: how many bytes are passing through my network connection right now?
It shows total values
Total bytes can be displayed too, since the program started...
Setup Figure 1
Setup Figure 2
Setup Figure 3
Setup Figure 4
Setup Figure 5
Setup Figure 5