XYplorer Beta Club

If you have view mode set to thumbnail view and you click and drag a picture file (dragging isn't actually necessary, all that is required is holding down the mouse button for more than one second), an annoying preview of the picture will pop up (mine says "xy trial version" in top left). Do you know how to make this not happen? Thanks for your help.

Tools \ Configuration \ Preview \ Thumbnails \ "Pop up Image . ."

that's a feature of XYplorer: MouseDownBlowUp.
You can drag items by their filenames, instead of thumbnails/icons.

Thanks to both of you. Both of those solutions work.