I somehow managed to move the target button (below the arrow) out of the upper window frame and can't grip it to move it back to it's position.
I tried to adjust the position with the sliders in the config, but it keeps disappeared.
Even in full screen mode I can't see it.
This concerns only one single char, while all others show the button correctly.
Maybe it helps to know, where Carbonite stores the button coordinates of a char's configuration to edit it manually?