snonalia you had this explorer window open in your initial post, are you starting the launcher via that exe? You should always use plutonium.exe to run the game.
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Bit hard to diagnose as there is no error message, you could try this:
go to windows security -> app & browser control -> exploit protection -> exploit protection settings turn off "randomize memory allocations (Bottom-up ASLR)"alt text
If it still doesn't work check event viewer for any error messages that come up when the game closes (start -> search for "event viewer" -> open -> windows logs -> application).