Retargeting

Hey guys, I wanted to ask how can I fix this. I have tried to retarget animations in exact same way that was shown in here: https://docs.unrealengine.com/latest/INT/Engine/Animation/RetargetingDifferentSkeletons/index.html
and I dont have the Retargeting Adjustments part as shown in the link above. What should I do? and is there way to just swap meshes or skeletons? thanks.