Need Help Fixing Default Styles for School Project

Hello! I am quite new to everything SketchUp related, so please bare with me. I am a student and I am trying to use different styles from the styles drop down as part of the assignment. However, at one point I thought I was in the “Edit” tab doing a style purge when I was actually in the “Select” tab and accidentally deleted several default styles that I need. Does anyone know how I can retrieve the default styles or download them back somehow?? I am very desperate at the moment, so any help is much appreciated. Thanks!