FL Studio is available in 4 versions, priced according features. The most featured version, and of course, also the most expensive one is FL Studio + ALL Plugin Bundle. The least one is FL Studio Fruity Edition.
When you test our free FL Studio demo, you test the features as included in FL Studio + ALL Plugin Bundle.
We will try to guide you to your choice by asking you a couple of questions (and in the mean time, explaining you some of the concepts of FL Studio along we go).
Please realise that the more features you need/want, the more likely you end up with the FL Studio + ALL Plugin Bundle which will cost you the most. So, please be aware that you can always upgrade later to a higher edition.
Ready to go?