mgear.core.anim_utils.IkFkTransfer.execute() is called with a hard-coded switchTo value instead of the parameter given to the function.
mgear.core.anim_utils.IkFkTransfer Line 2170:
ui.transfer(startFrame, endFrame, onlyKeyframes, ikRot, switchTo='fk')
should probably read
ui.transfer(startFrame, endFrame, onlyKeyframes, ikRot, switchTo=switchTo)