Using Win 10 Pro, Version 10.0.14393 Build 14393. I used Nirsoft's FileTypesManager to change the icon for .png files. This works for all .png files that I see in Windows Explorer (in any folder), the recycle bin, & even the Desktop folder if viewed in Windows Explorer.

However, it doesn't show up on my actual desktop. In fact, if I open IrfanView (my preferred image editor), paste an image & save it on my desktop as a .png, this is what happens.
1. The correct icon flashes
2. then it changes to a different icon & a thumbs.db file is created on the desktop

Somehow, I think that new image files are created as thumbnails, but I don't know why. I do have my pictures folder viewed as large icons, but my actual desktop is viewed as small icons.

How can I view .png files (or other image files) just as their default icons on my desktop?
Thank you in advance,