Until recently, I used BOSS to optimize my load order. However, since recently, it does not modify my load order anymore. The same happens when I change my load order in Wrye Smash. As far as I know, these tools work by setting the modification date of the esp/esm files, which the game should then sort according to that date. If I view my data directory in explorer, the modification dates have been changed correctly. Therefore I conclude that these programs also work correctly. When I open the data files in the launcher menu however, the load order has not changed at all. Rerunning BOSS does not work. Skyrim just does not manage load orders based on mod timestamps anymore, it seems. Manually editing the load order within Data Files does seem to work however, but is very impractical of course. Things that I changed recently (somewhere around the time the bug occurred), although it : - I deactivated lots of mods in order to start a new (clean) save, and sometimes activate them again in order to continue with my old save - I renamed TESV.exe to skyrim.exe and followed the steps in this tutorial in order to be able to start skyrim with SKSE from steam or the launcher I don't know if these things have anything to do with it but it can't hurt to tell it. Does anyone know how to solve this? Edit: my plugins.txt and loadorder.txt is also unmodified