File for Saved Game in folder, but does not show up in game.

You may try copying the file somewhere safe, then restart a game character with a new character, just do one fast all basic choices and then save as soon as you can.  Yes I said copy not cut, so you then have two copies, one extra just in case the game overwrites or pulls a fast one, you don't lose your save file.  Once you have the new save, check to see if it will load, and then check to see if you can switch characters to the old character.

This does two things, one it checks to see if it is just an odd glitch, and checks to see if your game has the ability to save and load a character or if it is that save specific.

I would also suggest having multiple saves run at least 5 and preferably 10+, just in case a save gets corrupted,  so you don't lose the entire play through.