Although it wasn't exactly the problem your suggestion help me. I manually edited the dat file to get the mouth I needed.

i had this problem. make sure you click on the parent folder and it should switch for ya. ... i think? RonC I am nor sure by what mean clicking on the parent folder. I import the mouth I want and it creates the switch. For some reason it doesn't use the rest image. what exactly did you do to fix it.

I created a file via papayago and it seems to work fine. The only problem is when I import a mouth in Anime Studio Pro the etc mouth shows when the rest mouth should be showing. Anyone having this issue and is there a fix to get the rest mouth to actually show.