I¡¯m fairly new to Kicad.? I am using Kicad V5.1.9 on Windows 10.? At the moment there are 5 files (file.pr) in File Explorer that show 0KB and I did something that caused the files to be lost.? How can I delete the dead .PR project files from the File Explorer.? The files were for test only, so I don¡¯t care if they are lost forever but I don¡¯t know what I did to lose them.