Must it always auto-update the preview after settings change?

I just started using version 7.0 of Gigapixel recently, and maybe I am missing something, but what I see, it is no longer possible to not automatically update the preview after changing a setting.

This is especially bad for those who have slower devices which need time and perhaps struggle to update the previews. Please bring back the ability to not update a preview on changing settings until an “Update Preview” button is clicked.

I understand, and we used to have this feature. Good idea to bring it back.