Hi @BrashAdmin, thanks for "morphing" answer, but I still can't understand the second part "Spriter Pro comes with the Essentials versions of all the art packs" What are you mean???? I have Spriter Pro, where are these "art packs"?
Ok, I find it :-P (Steam Installation Directory>/SteamApps/common/Spriter/Art Packs/Essentials)