you have been copy and pasting news from a weird site without getting the real info. This is 9.80 for the MX510 all it is is support for that mouse! The latest is 9.79 for all others!

off course it will support other mouses ALL the differnce is the 510MX support! hence why it isnt really mouseware 9.80. So installing it for other mice by logitech wont really do anything apart from possible errors. Its one of them fast deploy installs just for the mouse hence no official release for ALL the logitech family. Oh well the upgrade freeks will continue to have the LATEST updates without knowing what they do :/