Quote - Click the Selection Arrow on your viewing Window. Go to Props and select the highest numbered extra CenterOfMass or GoalCenterOfMass prop. Hit the Delete Key. When the popup comes up asking to delete the "Figure" hit Cancel. A Second Popup will come up asking if you want to delete the "Object". Click OK. Extra Prop is now gone. Continue doing this until all extra props are gone. When you get to the one that is not deletable you'll only get the "Figure" deletion Popup. Hit Cancel! You're done.

This is answer for my questions! Stupid me - most obvious solution is the best solution. I did not ask clear - I wanted to know WHICH center should I delete. Thanks for answers and interesting.
BTW does somebody use mass center option in his/her scenes? I did not noticed tutorial.

I never use it and do not really care how many centers or how many masses my figures have, but in the future I'm going to post some freebies or maybe place something on the marketplace. I do not want offer bugged figure, because bugs or misstakes are usually most interesting things for users ;)