Moderate
added new startup video settings so you don't have to wait for loading to finish before changing video settings
fixed bug where the sharpen shader for smokes and taking damage wouldn't activate
Minor
fixed bug in mushroom effect where the colorshifting outside psych realm stops
minor shader optimizations
Just in case this patch breaks anything for you...
You can return to the previous version by right clicking "Horns of Deliverance" in your library and selecting "Properties..." then "Game Versions & Betas" then selecting the previous-version branch