Thank you for the prompt repsonse!Generally you are encouraged to start a new saved game with any update they put out. Can you use your old save? Yes. Will it work without any bugs or glitches? Maybe, maybe not. When Alpha 17 came out and they released 17.1, there were a few changes with the perks. I was able to load the game fine and still play, but there were a few things that were messed up enough that it wasn't worth the effort to continue playing that save so I started a new one.