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 ...
attachment=0] error plugin.jpg [/attachment]
is it the plugin? or FL? Does anyone know what to do to resolve it?
I would use vst2 version but its sound is monophonic! pff
Also some more various issues with vst3 plugins in general ...