Windows 10 Compatibility
Sparkbooth does run on Windows 10, but there are some issues. Other than these issue, everything else appears to work without issues in Windows 10.
If you did the free upgrade to Windows 10, you can revert back to the previous version of Windows.
If you use the "Print directly to Windows system" setting, the setup button will not bring up Windows Photo Viewer to allow you to change the printer settings. Instead, go to an image file in Windows Explorer and right-click on the file, then select "Print" to open Windows Photo Viewer.