Is the not-public version available around here?
Unlike many developers, who make an "update" every three months to avoid losing their backers, GrimDark is a guy committed to his work; in constant dialogue with players (not just sponsors) and constantly creating and testing.
That costs money, of course, which is why it gives exclusives and advances to its sponsors in its various modalities. In turn, they constantly report bugs and ideas to improve the game.
Everything I have commented is to explain why they are not, at least in this forum, circulating paid versions obtained "the hard way".
If you can support him, cooperate with him to have early access to news. If you can't, as is my case, just wait for the public version that will surely be published soon.