New versions of 7-Zip (starting from version 15.06) use another file sorting Why 7z archives created by new version of 7-Zip can be larger than archives created by old version of 7-Zip? Then you can change file associations and some other options. Right-click the icon of 7-Zip File Manager, and then click Run as administrator. You must run 7-Zip File Manager in administrator mode. How can I set file associations to 7-Zip in Windows 7 and Windows Vista?
User FAQ Can I use 7-Zip in a commercial organization?
