After testing it for a while I have some news.
The first is: when in Class Trial there is no background on the text box, there is only the text.
Actually, all the display is gone. The left (or top) image shows how it was before and the right (or low) how it is now.
And with this issue it came another important one, the game now will crash when you can't answer the trial and it repeat the text for the third time (this will always occours), it's basically worst then before.
But not only the display isn't showing in Class Trial, but it's not showing anywhere anymore.
Wow! This last one with Mikan is horrible lol.
The text box outside the Class Trial is normal though.
Now, with the display issue we have this issue: where is the protagonist character when running around?
And some text are still like this: what the?
This are all the new infos I got. Sorry, but it's less playble then the previous version, while it fixed some texts like when entering the Usami Corral, but now there's no reticle and most of the display is off and now the game crashes in the Class Trial.
There's no savedata since it's still not possible to complete the class trial.