I understand your question more or less. The thing is, the 450 FX one includes the effects from those previous packages. But don't worry, for example, you can check out the package with more VFX, which covers everything, like the one with 1790 VFX. That one contains the .rar files of all the complete packages. The individual packages of 50 FX contain the 50 effects from that package and the demos.