Select the rar file you want to convert, then click 'Open' button. • PowerISO will open the rar archive selected, and list all files and folders in the rar file. • Click the menu 'File --> Save as.' • The 'Save As' dialog will popup. Enter the file name for the zip file, and select the file format to zip archives, then click 'Save' button. • PowerISO will start converting rar file to zip format.