It is a similar model downloading issue as some others have mentioned. Basically no model is found so no preview update or image save is valid. We will fix this but before done a few things can be done:
- if used in-app installer. close all the gigapixel programs. download the full installer, and install again.
if does not work, then
- contact our support team by the chat button here https://support.topazlabs.com/. Ask them for the full collection of models.