Every new release its 1 week earlier on patreon for jounin+, in appreciation of the people who support the project month after month. 0.39 will be here on July 21 at 01:00 Am GMT-3
You dont need to pay for playing newest version, it's a free game. The only difference on patreon (Jounin+ tier) is that you will be able to play it 1 week earlier