This new release comes with a new overall menu structure, improved workflow, low latency support for high powered devices and a bunch of new features. Furthermore it provides the now complete User Manual (including the chapters for the VA-Beast Synthesizer).
You can read the full list of changes in the release notes:
http://www.planet-h.com/g-stomper-studio/gst-whats-new/
http://www.planet-h.com/g-stomper-rhythm/rtm-whats-new/
http://www.planet-h.com/g-stomper-va-beast/vab-whats-new/
G-Stomper Studio 4.1 is now online on Google Play, Amazon and SlideME.