Snapfish doesn't support PictureMover starting tomorrow (5th of July, 2016). There is a statement on their website where they say this. You can also check it below as well or visit the website:
As of 5th July 2016 Picture Mover will be retired and no longer available. Please upload your photos through the Snapfish website or using one of our native mobile apps for iOS, Android, and Windows. The Windows app is also available on Windows-based desktops, laptops, and tablets. See Snapfish app in Microsoft Store. We suggest that you remove Picture Mover application from your computer.