Paolo is correct. I found this:
While we support VST plugins in FL Studio, we also develop plugins under our own ’ native ’ FL Studio format that gives us maximum flexibility to unlock host-plugin interactions, performance and stability. The flipside is that these plugins are not compatible with other hosts.
- FL plugin -> only works in FL Studio
- VST plugin -> works in all VST host programs.
- AU plugin -> works on Mac OS X.
- Stand Alone -> the plugin runs inside a self-contained host-wrapper.
Cantabile can’t run them.