Sorry, there is no update file, but you don't need to download v0.13.1. It only fixes four typos and a couple of images that had cosmetic problems.Hmmm... I already downloaded v0.13 and dont want to re-download v0.13.1 if it is only bug fixes (I'm on limited bandwidth). Does anyone know if there is a bugfix update to go from 0.13 to 0.13.1 please?