Fallen Enchantress has been abandoned by the developers in favor of the standalone Legendary Heroes, a game which is a carbon copy of FE with the addition of some hero units, fixes, and some superfluous content. Instead of patching LE, Stardock decided to ditch it entirely in favor of grabbing even more money from its naive customers. Stardock may have tried to create some goodwill by offering FE owners a discount on the latest version of their infamously buggy IP, but the fact of the matter is that Fallen Enchantress is still a broken, abandoned mess that never got patched or updated to an acceptable level.
I should probably mention that Fallen Enchantress is itself an "improved" paid update of another broken game, Elemental.
Instead of being a sucker and supporting such horrible development habits, save your money and wait a few months for Age of Wonders III.