Hello. In the options there is a setting to change the opacity of the dialogue background, and also change the texture to the default Ren'py one. This is under the "General" tab in the options.
The Chinese translation has now mostly been gone through and fixed, an updated version is available on my discord thanks to the Chinese speaking community! :) it will be included when 0.7 is released but you can download it earlier from the Discord!
Sounds like you're using the itch.io app. That might be how it works. if you open the game and in the main menu it says 0.6.5, then what you say must be the case.
If someone comes in and basically takes your job and you have a new boss after years of owning the place, she's not going to be happy about that. We'll see how she progresses in the coming updates.
Thanks for playing, Glad you've enjoyed it thus far!