When I purchased Dynamic Character Designer
I can't find where to replace it at all, I think the whole process of replacing footage is too complicated,
You should redesign the entire UI operation interface so that newcomers can get started quickly and understand it at a glance. Secondly, it will become easier to create various material replacements.

For example: we purchased new material props, and every time we need to use them, we only need to click on the character. When I edit the character, we can directly replace various props, parts, and even add actions to the character.

You need to carefully optimize this link, take your current product to the market and find a new person to use it, and see if they can replace these materials and props. This is very important.