For what i found out now. It's not available on Itch, because they no longer sell it on Itch, so you have to buy it on DLsite, in order to get the final version.
Viewing post in Syahata's bad day(ver1.0.1) update comments
If you worried that you cant buy it on DLsite, you can buy points to use instead of paying with your creditcard. Apparently most creditcards are invalid on the website, so using DLpay to buy points for the purchase of the product is the most best solution.
Currently its unavailable for purchase, but shows its gonna release in late June, so hopefully its back up and running soon.
As for your question, yes i do have the paid version, but i dont think i can share it. But i also dont wanna sadly. I do hope that the game isnt lost in the void, due to something bad could of happen to it. But it should release again in hopefully after the review.
Hope you have a good day.