Hi,
I have a problem (Spine 3.8.58) with Spine Settings > Graphics: Viewport linear filtering (unchecked) and Viewport pixel grid (checked). Every time I run Spine I need to change this values. Save button don't work for this, in older versions that was working correctly.
I have also question about Preview window. This window looks like it don't show viewport pixel grid property. Is it possible for viewport to display with a pixel grid in future?