Use
MobiPerl. Under Windows there is no need to install perl, and there is a GUI version (
Mobi2Mobi GUI v0.09 Now Supports .MOBI extn). Also on Windows, you can edit the names in MobiPocket Reader (which updates the .mbp file) and then use mobi2mobi's --mbpfile FILE option to use the author and publisher info from the mbp file.