- Open CC3 and keep the default CC3 lady avatar.
- Add clothing (Hensley longsleeve from Essential Clothing but anything will do)
- Click on Appearance Tab / Outfits
- Open the Decal section
- Click on Custom for the Diffuse Texture
- You are now greeted with a window saying "Skin Gen Premium Plug-In provides full editing capability such as loading custom textiles and saving source textures for furhter enhancements. Click "more" to explore its entire feature set."
- Neither clicking "more" or "OK" allows you to proceed in editing the texture.