The major new thing is the Hydra, which replaces the Junglist. Where the Junglist was designed specifically for use in jungle/drum'n'bass music, the Hydra is infinitely more versatile, delivering a huge array of useful and original sounds for all genres of electronic music. It is switchable between three different routing models, which combine the three oscillators in different ways - which is like having three different synthesizers in one. And more than often, a single click of the routing switch will give you a whole new sound.
A Windows VSTi/DXi demo version of Hydra can be downloaded immediately and purchased online for $99 US. Junglist owners can upgrade to Hydra for US$29 - the price difference between Junglist and Hydra.
Scorpion v4.0 has also been released, and has an added delay/tremolo section, which creates new stereo widening and delay effects.
Finally, the updated Plucked String v4.0 features a new string model with an even more natural sound than previous versions - plus a new vibrato section.
The Scorpion and Plucked String updates are free for registered customers.
You can also buy Synth Pack Pro, which includes all three instruments for $149, a 30% saving on their individual prices.