Visit the official GS16 download page to grab the new build. Build 611 is now available and works with the last 16.3.0 update.
If you own the "g" edition already, you should already have received an email containing download link for the new version on March 5th. If not, use the check for updates option within GS16 to get it.
If you don't own the "g" edition yet, consider donating to Eugene to support his development of this brilliant tool, and he will reward you with it.