Skyrim Special Edition 1.1.51
Fixes
General performance and optimization improvements
Fixed rare issue with NPCs not appearing in proper locations
Fixed issue with saves erroneously being marked as Moddded, even though no mods are active
Updated some sound files to not use compression
Skyrim Special Edition 1.2.39
Fixes
General stability and performance improvements
Fixed issue related to using alt-tab while playing the game (PC)