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DDSOpt stores the settings under the Bethesda Softworks key in the registry, so that key probably doesn't exist. It should show up after running Skyrim for the first time. You can double check by launching "regedit" and looking for the following key (for x64 systems): HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Bethesda Softworks You can also try launching Skyrim via the launcher (not via SKSE or ATTK) to see if the key gets created. Those settings really should be stored under HKCU to avoid write problems. I think DDSopt can also create that key because my settings save on a PC that has never ran Skyrim.

Thanks for the informative reply. I'm using DDSopt - pre-release - update 4 (version 0.8.0.upd4). I can't check which parameters are different than the pictures at the moment. I had assumed the INI configured the program automatically. I'll adjust the parameters to match the pictures.

This guide says you can optimize 6 out of 8 of the non-textures BSAs:Â https://wiki.step-project.com/Guide:BSA_Extraction_and_Optimization#tab=Optimizing_Vanilla_BSAs

I'm confused at this part of the guide: https://wiki.step-project.com/Guide:DDSopt_%26_Texture_Overhauls#tab=Using_DDSopt My settings look nothing like these reference images (Main Menu Settings & Behave Menu Settings). Shouldn't the INI file I downloaded make the settings appear as the images, or do I have to manually change all the settings to match those shown in the images regardless?.. Or are those images are from an outdated INI? Can I safely use these same settings for optimizing all of these BSA files below: Skyrim - Animations.bsaSkyrim - Interface.bsaSkyrim - Meshes.bsaSkyrim - Misc.bsaSkyrim - Shaders.bsaSkyrim - VoicesExtra.bsaSkyrim - Textures.bsaHighResTexturePack01.bsaHighResTexturePack02.bsaHighResTexturePack03.bsaDawnguard.bsaDragonborn.bsaHearthFires.bsaOr do some of these require different settings individually? I'm sorry for all the questions, but I have to be sure (hopefully it'll help someone else too).. It's a pain for me to use DDSopt because it isn't compatible with my home computer (Windows XP). I have to bring the BSA files with me to work and do the DDSoptimization there. :><: