The files are ZIP-compressed for faster downloading. To unzip them you need a software compression utility. The unzipping utilities for different operating systems can be downloaded from our page http://www.pmm.it/tools.htm. PMM 7000 SOFTWARE UPDATE INSTALLATION INSTRUCTIONS: A) Always keep a safety copy of the PMM 7000 original diskette B) De-compress the file 7000.ZIP, downloaded from the PMM Web site, in a temporary directory of your hard disk. C) Select and copy all the extracted files on a new diskette. D) Mark the diskette with the new software version and date. E) Install the new software version running setup from the diskette.