What data is Hamachi sending?

I use Hamachi to connect our different branch computers via remote desktop.

I see that if I right click a computer on the network and select "details", in the window it opens, it shows how much data was sent to that computer from the server. It is 20h45 at night, I am the only one working, but yet Hamachi is sending and receiving to and from all computers. It is about 20Mb per hour per computer. Not much, but with ten computers that is 200 Mb per hour going down the drain while nobody is working.

Anybody perhaps know what it is sending or how I can check what it is sending?

Sending far more than receiving, Out is 19,457 Kb and in is only 540 kb