Did you ever get it working?
You may need to erase your save data and start over. If that's not an option, you can try sending me your save data so see if I can repair it.
Either way, follow the gif below to find vTuber kit's save data. You can either delete this file or email it to me at kyuppin@gmail.com.
Follow up here to let me know what you decide to do. Sorry for the super late response.
