Convert Rotations 
Converts the rotation order to a new rotation order, while keeping the animation as is. Convert Rotations will recreate the overall keyframes at the same positions of the previous order, but with the new values and new handles. Convert rotation will try to match the new handles to the new rotation order values, using the smart bake handles recalculation algorithm.
Find Euler Rotation
Will give a list of Euler rotations, that are recommended to use for the current animation. The list will go from the most recommended to the least recommended order, and will setup the enumerator property to the most recommended. This recommendation is based on the rotation order that has the least gimbal lock issues.