You don’t open these you replace the .uasset in your content browser with the older one in your autosave. It’s just a saved copy of an older version of that same .uasset file. For exmaple, lets say your newmap is corruptwd. take whatever newmap .umap you want from the autosave folder, find the file location it would be in in your content folder, rename it to the same thing , drop it in, and delete the original .umap file. Granted, you’ll have absolutely no idea how hold that .uasset file is and how much you’ll be losing. That’s generally what source control is for.