Sorry if this is too late and you've already figured out how to do this, but you simply have to add a scale control to the models. Click on where the model's name in 'Animation Set Editor', click 'Utilities', and the last one should be 'Add Scale Control To Models'. Then, press the + on the model's name, press the + on the 'Body' section, and it should be the last in the section. Hope this helps you, if you haven't figured it out!