Unfortunately, no.Is there any way to stop Daz from making tiny "icon" copies of every file it renders? It makes going through the renders folder annoying.
The icons are there to show in the asset browser (drill into "my library" / "scenes" to see them, if you are using the default save location).
If they really annoy you, it would be possible to setup a scheduled task with a batch/Powershell script to find and delete them daily or whatever.