I think you are misunderstanding the issue -- if you can even call it an issue.
The way I understand it is that:
- There is the game version on one hand
- And the translation version on the other.
The problem is not the translation. The translation is patched to the latest version.
The problem is the game version itself. The game version is 1.00. There is however a newer patch 1.01. That patch should fix some bugs, and that patch is (maybe) not included in the download link of the first post.
Alternatively, the 1.00 version as shown in game is wrong and/or shown wrongly -- maybe due to how the translation patch works and/or they edited an older file for that specific image or piece of text. That is possible as well and also fairly likely, since the uploader states this is in fact version 1.01 in the first post.
So it could be that this is in fact version 1.01, but that its just an error in the menu.
If you want to apply game patch 1.01 yourself, you have to (download the original installer files and) reinstall the entire thing, because patches have to be applied in a specific order.
One guy says he did just that, so you can also download from his link (at your own risk):
https://f95zone.to/threads/kami-no-rhapsody-v1-01-append-1-2-eushully.42955/post-2836052
According to one guy who downloaded it, his version however also shows 1.00.