Hello there. IT's specified in this page over bold letters, but here's the answer: The current Build fo the public is the 0.49.0.35, the next scheduled public build is scheduled for December, and it will be the build 0.53.0.35.
Said build, is already available for Tier 1 Patrons, and in November, Tier 0 patrons will also be able to download the next public build earlier before it's put for the public in December.
Patrons have access to monthly updates, currently Tier2+ patrons have access to Builds 0.63.0.35 and this month is scheduled to release the build 0.64.0.35.
I hope that helped you somehow.