Is there a way to have Dopus display the thumbnails for a folder (or globally all folders) based on the file with the most recent "Date Created" time stamp. ?
Currently Dopus chooses the thumbnails for all folders based on the "Date Modified" time stamp.
If this is possible, then would it also be possible to define this even further? Ex:...
"Choose thumbnails for folder using image file extensions only"
If not, then it would be a suggestion I would recommend adding to the ToDo list.
Don't think you can make it use creation instead of modified date for finding the thumbs.
If it's text-file thumbnails that are bothering you, you can turn those off in folder-thumbs by configuring the Text-File Thumbnails plugin. It has a checkbox, "Include in folder thumbnails". Note that you should turn it off for each of the extensions in the plugin's list.
If you want a fixed image to display you can always create a folder.jpg for each of those folders. (It'll only display one image instead of four then, though.)