Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Takes more time to register than you will spend with the software

Seriously, this is one of the worst application ever made. It crashes on Leopard. If you ever need to update or reinstall, you have to email them for a link to download the update by FTP. Then email them again to get a software key. A software key? This is in addition to the registration code that you also have to enter. It would be less frustrating to transcribe everything by hand. Purchased. Installed. Registered. Emailed. Entered key. Deleted application from my drive.