I can't recover my last save after a crash,How do I recover an autosave?\

I was working on a project and using blueprints and I had to undo something that happened a while ago, and when I did, it deleted everything from the beginning and then it crashed. When I went into the project again, I was where I was before it crashed, but then I hit restore previous save (thinking it would be the right save but it wasn’t and it took me back to the beginning again). I tried browsing for the autosave, but I cannot find any through the browse option. I looked in file explorer for it first and it was saved as UAsset. I had a lot of work done, and do save a lot. Is there any way to recover this? It also doesn’t give me the option the change the file type I am looking for.!

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,K

Also, if I go into maps to load up a previous one, it is not there either. It is saved as a UMAP but when I want to load it up, it doesn’t let me change the file type.