Yesterday I bought the first season of this game on Steam. However, when I was playing trough it today I got nothing but a black screen once I reached episode 2 - the sound is playing, but there is no visual, except for the titles and the caption; 'three months later'. This last caption stays on the screen while a zombie is gurgling at me.
I have tried the solutions I found online (making sure the preps.prop files are synched) but here I also ran into a problem: I did not have a preps.prop file within my Steam folders; only within the Telltale folder in 'My documents'. I copied this file to the folder 'Steam/steamapps/common/The Walking Dead/Pack/default' and the folder 'Steam/steamapps/common/The Walking Dead/Pack/WalkingDead102', but this had no effect. I changed the name of the file in the folder 'Steam/steamapps/common/The Walking Dead/Pack/WalkingDead102' to 'prefs.prop.bak', but this also had no effect.
I have run your support tool, and the file it created can be found here: https://www.sendspace.com/file/5gqkks
I hope this issue can be resolved, since so far I have had a lot of fun with this game.