Public ViewerFolder As String = File.DirAssets
...
ScaleImageView1.ImageFile = Starter.ViewerFolder & Starter.ViewerFilename
This won't work. File.DirAssets is a special folder and only works with File.OpenInput, it cannot be concatenated to form a path to a file. I guess you haven't bothered to read the Readme.txt file in the demo. I suggest that you do so now!