[NEED HELP] How to Save Mesh Changes in a Preset?

[VadimAndreyevich85]

So I tried to use Outfit Studio to make my own BodySlide preset, by tweaking the shape of the body using Brushes and Tools. After saving the preset, building outfits, and launching the game, I realized that all of the editing that I had worked on the body was gone. How exactly should I save the editing to the mesh? I have seen a few presets online that includes edited mesh, but I can't figure out how.