This application is very helpful - being fairly easy to use - and the developer has been generous enough to allow others to use it free of charge. I paid $15 for Defaulter and it has been of absolutely no use to me. I am yet a novice with preferences and plists, and I thought Defaulter would be my guiding light until I had time to sink my teeth into preferences and plists. I could not have been more wrong. There is practically no Defaulter documentation, and the person selling Defaulter ignored me totally when I asked for help. This application, which is free, is very good. I believe Pref Setter has more documentation. It isn't possible to have less. Above all, I thank the Pref Setter developer for being so amiable with this worthwhile application. I also have PListEdit Pro, which is a fine application I am sure, and I will make use of it thoroughly one day, but Pref Setter sure helps now and will stay in my arsenal along with Preferential Treatment! Thanks!