Question about Addit Pro

Hi Folks,

I Just discoverd the program Addit Pro, which seems to me to be a useful tool.
But there is one aspect that I don't understand:

For instance: 
I open the program, choose to see the aircraft list, choose an aircraft after which I see some lines in red at the bottom side of the screen and some lines in black.
Does the red lines mean that there is something wrong with the choosen plane?
In the Addit Pro Help I can't find an answer. Maybe any of you can help me out????

Flying greetings,

Edzard