Simon Philips Jazz Drums double presets and "Eco" library

Hi there,

i installed SP Jazz Drums some time ago and i have every preset double (also the brushes) and i don’t know why.
Apart from that i saw that there is also an Jazz Drums library in my folder that says ECO. Does anyone know what this is and if it is needed for the regular “full quality” drumset? Thanks

I will have to check when I get home but I think Eco is the light samples that use less resources. For working on demos and so on.