Create a new file in directory of plugin

I have installed RacesandClasses plugin. And its works nice! But I want to create a new class. And the only way its copy-paste file or create it. There isn´t command into the plugin to create this class (or race) in game. So.. There any way that we can create files .YML or something to create a new class. I add a Pictures with the default class. Thanks and sorry for my English