Natural Progesterone Creme CH - Version 1.0 Natural Progesterone Creme CHMOD calculator. This easy to use free CHMOD calculator will show you how to set file permissions in both Octal and Symbolic format. It will teach you how to set file permissions until you remember how to do it yourself. No installation is required. Although many scripts are available as a free download, they need to be installed to your website before they can be used. No installation is required. Just download the program and doubleclick to run it.