This text is missing some spaces, please add them: IfyourPCopensthe000001file,butit'sthewrongapplication,you'llneedtochangeyourWindowsregistryfileassociationsettings.Inotherwords,Windowsisassociating000001fileextensionswiththewrongsoftwareprogram.
If your PC opens the 000001 file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating 000001 file extensions with the wrong software program.