After downloading run the self extracting .exe file and choose "unzip". You should not save anything to the drive where your deleted files are, in order to prevent the deleted files from becoming overwritten. If your deleted files are for instance on C:, do not install any software at all and also do not download anything to C: (download Recover4all® for instance to a USB drive). Recover4all® does not require installation and can be run directly e.g. from a USB drive.