I double checked this for my own finished game where I also use the same plugin...

It seems I also have that.
To my understanding its supposed to give you some extra clarity on which enemy you've selected, so for instance when you've hovered over Arctic Tank (Snow Riders) A it would let you know you have highlighted that enemy. For some reason your Enemy window below is not showing this?
This could be a problem with your windows X and Y co-ordinates, or conflicting with other plugins?
One quick solution to this if you don't want to start digging would be to simply turn that imagefor the Enemies window transparent in a program like GIMP and hide it away from player view for now.