It has lots of new features including...
-ask permissions only once and then animate without having to ask again
-multiple notecard setup for creating animation sets
-quick menu system to quickly find the animation you want
-cleaner, simpler interface design
-autoupdate (version 3 is copy/no trans unlike my previous one)
-improved positioning + works with Havok 4
-lots of new animations
It is available in my stores in world, and on slexchange.
My Main Store SLURL is http://slurl.com/secondlife/Animations/128/128/0
