FLStudio's plugin manager is not up to date with the latest versions of the SDK.
This was taken from the page "VST 3 Locations / Format" in the SDK documentation:
[quote]
On the Windows platform a VST 3 Plug ...
fl 32bit and fl 64bit) .. and then says.. it appears you don't have this plugin.. not a serious problem blabla.. google kvr.. ... ..
It happened today.. I bought the vertigo vsc-2 from Plugin Alliance ...