Like many of you I have to run the game in administrator mode due to the launcher crashing when I start it. I did finally get access to my saves, although it required a bit of replaying. First, some info:
I have the steam copy of the game
I run the game in administrator mode but not in compatibility mode.
I tried the registry fix listed elsewhere but it did not grant me access to the saves. I haven't undone it though so it may be required, I can't say.
So I discovered that originally my saves were stored here:
C:\Users\Alan\Documents\Telltale Games\The Walking Dead
But now they are stored here:
C:\Users\Public\Documents\Telltale Games\the walking dead
Can't say if it's because of the registry editing or the administrator running. Problem is, the prefs.prop file tells the game at minimum what chapter you're up to, and I messed up my prop file during my various attempts to get my saves back.
What I ended up doing though was copying my brother's copy of prefs.prop from his computer to mine (in both locations just to be thorough). I also copied my saves over to the new location.
His stats appeared in the game menu but I was able to rewind episode 2 to the escape chapter and re-complete the episode from near the end. My choices up to that point were correct (my brother killed Larry, I tried to spare him so I know it worked) and now I think episode 3 should work for me with my choices. Once I completed episode 2 again the stats page was correctly updated, although my stats page for episode 1 still shows my brother's choices. I don't mind that though.
Hopefully this helps you guys. I attached my prefs.prop file so that you can use it to get the game to recognize your saves as well.
Note: Rewinding just one chapter made the game crash for me. I had to rewind to just after the meat locker scene, right before you take on the first brother.