I have contacted luxion for that, and this is what they answered:
"Thank you for contacting Luxion.
Keyframe animation can only use the origin Pivot of an object. It is very important that the pivot is centered or placed in the position you want in your CAD software before bringing the model in to KeyShot."
and in addition for the missing option:
"This was an update done in later versions of KeyShot 10 due to this option of selecting center was causing the animations to become corrupt.
It was a bug fix we did."