There are plenty of image view/edit programs you can use for the Video Mill Text Screen Preview app. But if you like the old Windows Photo Viewer (Figure 1), you can use it with just a few minutes of setup.
Windows Photo Viewer isn't exposed in Windows 10 by default. If you upgraded to Win10 from Win7 or Win8.1, you may still see it. If you can't find it, see this article: How to get Windows Photo Viewer back in Windows 10.
If you want to use Windows Photo Viewer for the Video Mill Text Screen Preview app, you have two choices.
1) Make Photo Viewer the default windows app for opening PNG image files.
2) Or follow the procedure below to create a batch file that will facilitate it.
If you chose method #2 above, you will need to take an extra step. Since there is no PhotoViewer.EXE file (it is a .DLL file), you will need to add a Windows batch file to open the program.
Listing 1. PhotoViewerOpen.batrem Open an image file in Windows Photo Viewer rem Must remove double quotes from input filename %1 set inFilename=%1 set inFilename set inFilename=%inFilename:"=% set inFilename "C:\Windows\System32\rundll32.exe" "C:\Program Files (x86)\Windows Photo Viewer\PhotoViewer.dll", ImageView_Fullscreen %inFilename% rem pause