It didn't open, not even some of its saved files are missing. It's there but it's not there
Go into your game, find a save file you aren't using. Like lets say File 20. Load one of your saves, then save again in File 20. Close game or minimize it. Go to my save and rename it File21.
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Side note of explanation:
File1 in your folder is your autosave in game.
File2 in your folder is File 1 in your game.
So File21 in your folder is File 20 in game.
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Now replace your File21 with my file that you renamed to File21 (Or whatever save file you chose to use).
Go back to your game and load File 20 (or whatever you decided to use.)
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You have to tell your global and config files that you have a save in the location, that is the reason you have to first make that save spot in game, and then replace that save with the one that you want to import.
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In typing these instructions I realized I gave you my autosave, I am not sure where it is, it might be tired and low energy. (I recently tested to see if Katherin would show a bump by skipping a couple weeks ahead, she doesn't).
So here is my File 1 in game.
(I haven't done Winterhowl with this file yet, I only played this a few weeks ago and decided to wait until actual December instead of skipping half a year in game, or adjusting my PC's calendar.)