From http://www2.hifisim.com/node/1044:
Active Sky Evolution is the next installment in the Active Sky series, bringing further refinement and accuracy in weather synthesis and depiction, improved smoothing, increased high-fidelity aircraft compatibility, a new graphical look and many other behind-the-scenes improvements to further increase your desktop flight and weather simulation experience!
Upgrade for FREE!
If you currently own a license for ASA, ASE is being offered as a free upgrade! Visit the Downloads Page to get it now!
I'm going to download now and see if it is any good and see how it gets on with some of the issues ASA has given me.
No doubt Jim will give us some background