There are no signs that a version jump to 0.4.0 is coming soon, so next public is almost guaranteed to be 0.3.5, yes.
And the "new" build here is a Patreon build from almost 6 weeks ago. A bit of an odd timing, but who knows what the source is.
(Pro tip: You can read the headlines on the Patreon posts without signing up for anything, so it is easy for anyone to check what the current build is.)
As always, if you want to play this particular game, you are probably better off sticking with the latest public instead of whichever leaked version is the latest. While some leaked builds are almost as bug-free as a proper release, others are almost unplayable. And you never know which you get.