We don't blame you. Why continue guessing and relying on instinct when you have a powerful and insightful approach to story available to you right now?
As of right now, there are actually 2 different versions of Dramatica you can choose from, Dramatica Pro for PCs and Dramatica Story Expert for Macs. Both are essentially the same--Dramatica's powerful predictive story engine drives both versions.
The Story Expert (or Mac) version differs in that it provides a more comprehensive overview of your story's dynamics, a new feature entitled "Gists" that make Dramatica's sometimes-abstract terminology more approachable, and a whole host of other updates and features that make this the latest and greatest version of the application available.