It's not possible to update Hachimi while the game is running, so there will be a separate update helper that also doubles as an installer if launched normally. The application would include a copy of the Hachimi dll embedded in the executable. Hachimi can download it and launch it, which it will then wait for when it can access the destination dll file. Once its running, Hachimi will close the game, and the update helper will install it and restart the game.
It's not possible to update Hachimi while the game is running, so there will be a separate update helper that also doubles as an installer if launched normally. The application would include a copy of the Hachimi dll embedded in the executable. Hachimi can download it and launch it, which it will then wait for when it can access the destination dll file. Once its running, Hachimi will close the game, and the update helper will install it and restart the game.